Re: [alsa-devel] Hercules P32 DJ: severe sound distortion during MIDI transfers

21 Mar 2019


      I wonder if this might be due to a bug in the "USB Audio Driver for Alsa"?
[1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/soun...
/usb
[2]https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git/tree/sound/u...
b
Guido
On the 20th of March 2019 at 21.47 Guido Trentalancia
     <guido@trentalancia.com wrote:
Hello.
I am hitting a very serious bug (ALSA kernel driver or ALSA library)
     when using the Hercules P32 DJ audio interface.
The sound is severely distorted during MIDI transfers.
To reproduce:
     * start playing something in a first console:
console1# AUDIODEV=hw:2,0 play audio.wav
     * the audio plays fine
     * now start "amidi" in a second console while the above track is
       still
       playing
console2# amidi -p hw:2,0,0 -d
     * the sound is now severely distorted (basically noise, with some
       hard-
       to-distinguish features resembling the original track) until
       "amidi" is
       interrupted !
Kernel versions tested: from 4.12 up to 5.0.2 (latest).
NOTES: Always reproducible. Same device is working fine on Windows.
The output from alsa-info.sh and lsusb -v follows.
upload=true&script=true&cardinfo=
     !!################################
     !!ALSA Information Script v 0.4.64
     !!################################
!!Script ran on: Wed Mar 20 20:44:36 UTC 2019
!!Linux Distribution
     !!------------------
!!DMI Information
     !!---------------
Manufacturer: Acer
     Product Name: Aspire 5745G
     Product Version: V1.19
     Firmware Version: V1.19
     Board Vendor: Acer
     Board Name: JV51_CP
!!ACPI Device Status Information
     !!---------------
/sys/bus/acpi/devices/PNP0103:00/status 15
     /sys/bus/acpi/devices/PNP0C0A:00/status 31
     /sys/bus/acpi/devices/PNP0C0F:00/status 9
     /sys/bus/acpi/devices/PNP0C0F:01/status 9
     /sys/bus/acpi/devices/PNP0C0F:02/status 9
     /sys/bus/acpi/devices/PNP0C0F:03/status 9
     /sys/bus/acpi/devices/PNP0C0F:04/status 9
     /sys/bus/acpi/devices/PNP0C0F:05/status 9
     /sys/bus/acpi/devices/PNP0C0F:06/status 9
     /sys/bus/acpi/devices/PNP0C0F:07/status 9
!!Kernel Information
     !!------------------
Kernel release: 5.0.2
     Operating System: GNU/Linux
     Architecture: x86_64
     Processor: unknown
     SMP Enabled: Yes
!!ALSA Version
     !!------------
Driver version: k5.0.2
     Library version: 1.1.8
     Utilities version: 1.1.8
!!Loaded ALSA modules
     !!-------------------
snd_hda_intel
     snd_hda_intel
     snd_usb_audio
!!Sound Servers on this system
     !!----------------------------
Pulseaudio:
     Installed - Yes (/usr/bin/pulseaudio)
     Running - No
Jack:
     Installed - Yes (/usr/bin/jackd)
     Running - No
!!Soundcards recognised by ALSA
     !!-----------------------------
0 [MID ]: HDA-Intel - HDA Intel MID
     HDA Intel MID at 0xb7100000 irq 27
     1 [NVidia ]: HDA-Intel - HDA NVidia
     HDA NVidia at 0xb3000000 irq 16
     2 [DJ ]: USB-Audio - Hercules P32 DJ
     Guillemot Corporation Hercules P32 DJ at usb-
     0000:00:1d.0-1.4, full speed
!!PCI Soundcards installed in the system
     !!--------------------------------------
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset
     High Definition Audio (rev 05)
     01:00.1 Audio device: NVIDIA Corporation GT216 HDMI Audio Controller
     (rev a1)
!!Advanced information - PCI Vendor/Device/Subsystem ID's
     !!-------------------------------------------------------
00:1b.0 0403: 8086:3b56 (rev 05)
Subsystem: 1025:035b
     --
     01:00.1 0403: 10de:0be2 (rev a1)
     Subsystem: 1025:035a
!!Loaded sound module options
     !!---------------------------
!!Module: snd_hda_intel
     align_buffer_size : -1
     bdl_pos_adj : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-
     1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
     beep_mode :
     N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N
     enable :
     Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y
     enable_msi : -1
     id :
     (null),(null),(null),(null),(null),(null),(null),(null),(null),(null
     ),(
     null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
     ,(n
     ull),(null),(null),(null),(null),(null),(null),(null),(null),(null),
     (nu
     ll),(null)
     index : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-
     1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
     jackpoll_ms :
     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
     model :
     (null),(null),(null),(null),(null),(null),(null),(null),(null),(null
     ),(
     null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
     ,(n
     ull),(null),(null),(null),(null),(null),(null),(null),(null),(null),
     (nu
     ll),(null)
     patch :
     (null),(null),(null),(null),(null),(null),(null),(null),(null),(null
     ),(
     null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
     ,(n
     ull),(null),(null),(null),(null),(null),(null),(null),(null),(null),
     (nu
     ll),(null)
     pm_blacklist : Y
     position_fix : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-
     1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
     power_save : 0
     power_save_controller : Y
     probe_mask : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-
     1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
     probe_only :
     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
     single_cmd : -1
     snoop : -1
!!Module: snd_hda_intel
     align_buffer_size : -1
     bdl_pos_adj : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-
     1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
     beep_mode :
     N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N
     enable :
     Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y
     enable_msi : -1
     id :
     (null),(null),(null),(null),(null),(null),(null),(null),(null),(null
     ),(
     null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
     ,(n
     ull),(null),(null),(null),(null),(null),(null),(null),(null),(null),
     (nu
     ll),(null)
     index : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-
     1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
     jackpoll_ms :
     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
     model :
     (null),(null),(null),(null),(null),(null),(null),(null),(null),(null
     ),(
     null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
     ,(n
     ull),(null),(null),(null),(null),(null),(null),(null),(null),(null),
     (nu
     ll),(null)
     patch :
     (null),(null),(null),(null),(null),(null),(null),(null),(null),(null
     ),(
     null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
     ,(n
     ull),(null),(null),(null),(null),(null),(null),(null),(null),(null),
     (nu
     ll),(null)
     pm_blacklist : Y
     position_fix : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-
     1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
     power_save : 0
     power_save_controller : Y
     probe_mask : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-
     1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
     probe_only :
     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
     single_cmd : -1
     snoop : -1
!!Module: snd_usb_audio
     autoclock : Y
     device_setup :
     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
     enable :
     Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y
     id :
     (null),(null),(null),(null),(null),(null),(null),(null),(null),(null
     ),(
     null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
     ,(n
     ull),(null),(null),(null),(null),(null),(null),(null),(null),(null),
     (nu
     ll),(null)
     ignore_ctl_error : N
     index : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-
     1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
     pid : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-
     1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
     quirk_alias :
     (null),(null),(null),(null),(null),(null),(null),(null),(null),(null
     ),(
     null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
     ,(n
     ull),(null),(null),(null),(null),(null),(null),(null),(null),(null),
     (nu
     ll),(null)
     use_vmalloc : Y
     vid : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-
     1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
!!HDA-Intel Codec information
     !!---------------------------
     --startcollapse--
Codec: Realtek ALC269VB
     Address: 0
     AFG Function Id: 0x1 (unsol 1)
     Vendor Id: 0x10ec0269
     Subsystem Id: 0x1025035b
     Revision Id: 0x100100
     No Modem Function Group found
     Default PCM:
     rates [0x560]: 44100 48000 96000 192000
     bits [0xe]: 16 20 24
     formats [0x1]: PCM
     Default Amp-In caps: N/A
     Default Amp-Out caps: N/A
     State of AFG node 0x01:
     Power states: D0 D1 D2 D3 CLKSTOP EPSS
     Power: setting=D0, actual=D0
     GPIO: io=2, o=0, i=0, unsolicited=1, wake=0
     IO[0]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
     IO[1]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
     Node 0x02 [Audio Output] wcaps 0x1d: Stereo Amp-Out
     Control: name="Headphone Playback Volume", index=0, device=0
     ControlAmp: chs=3, dir=Out, idx=0, ofs=0
     Device: name="ALC269VB Analog", type="Audio", device=0
     Amp-Out caps: ofs=0x57, nsteps=0x57, stepsize=0x02, mute=0
     Amp-Out vals: [0x00 0x00]
     Converter: stream=5, channel=0
     PCM:
     rates [0x560]: 44100 48000 96000 192000
     bits [0xe]: 16 20 24
     formats [0x1]: PCM
     Node 0x03 [Audio Output] wcaps 0x1d: Stereo Amp-Out
     Control: name="Speaker Playback Volume", index=0, device=0
     ControlAmp: chs=3, dir=Out, idx=0, ofs=0
     Amp-Out caps: ofs=0x57, nsteps=0x57, stepsize=0x02, mute=0
     Amp-Out vals: [0x51 0x51]
     Converter: stream=5, channel=0
     PCM:
     rates [0x560]: 44100 48000 96000 192000
     bits [0xe]: 16 20 24
     formats [0x1]: PCM
     Node 0x04 [Vendor Defined Widget] wcaps 0xf00000: Mono
     Node 0x05 [Vendor Defined Widget] wcaps 0xf00000: Mono
     Node 0x06 [Audio Output] wcaps 0x211: Stereo Digital
     Control: name="IEC958 Playback Con Mask", index=0, device=0
     Control: name="IEC958 Playback Pro Mask", index=0, device=0
     Control: name="IEC958 Playback Default", index=0, device=0
     Control: name="IEC958 Playback Switch", index=0, device=0
     Control: name="IEC958 Default PCM Playback Switch", index=0,
     device=0
     Device: name="ALC269VB Digital", type="SPDIF", device=1
     Converter: stream=5, channel=0
     Digital:
     Digital category: 0x0
     IEC Coding Type: 0x0
     PCM:
     rates [0x5e0]: 44100 48000 88200 96000 192000
     bits [0xe]: 16 20 24
     formats [0x1]: PCM
     Node 0x07 [Vendor Defined Widget] wcaps 0xf00000: Mono
     Node 0x08 [Audio Input] wcaps 0x10011b: Stereo Amp-In
     Amp-In caps: ofs=0x0b, nsteps=0x1f, stepsize=0x05, mute=1
     Amp-In vals: [0x8b 0x8b]
     Converter: stream=0, channel=0
     SDI-Select: 0
     PCM:
     rates [0x560]: 44100 48000 96000 192000
     bits [0xe]: 16 20 24
     formats [0x1]: PCM
     Connection: 1
     0x23
     Node 0x09 [Audio Input] wcaps 0x10011b: Stereo Amp-In
     Control: name="Capture Volume", index=0, device=0
     ControlAmp: chs=3, dir=In, idx=0, ofs=0
     Control: name="Capture Switch", index=0, device=0
     ControlAmp: chs=3, dir=In, idx=0, ofs=0
     Device: name="ALC269VB Analog", type="Audio", device=0
     Amp-In caps: ofs=0x0b, nsteps=0x1f, stepsize=0x05, mute=1
     Amp-In vals: [0x00 0x00]
     Converter: stream=1, channel=0
     SDI-Select: 0
     PCM:
     rates [0x560]: 44100 48000 96000 192000
     bits [0xe]: 16 20 24
     formats [0x1]: PCM
     Connection: 1
     0x22
     Node 0x0a [Vendor Defined Widget] wcaps 0xf00000: Mono
     Node 0x0b [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
     Control: name="Mic Playback Volume", index=0, device=0
     ControlAmp: chs=3, dir=In, idx=0, ofs=0
     Control: name="Mic Playback Switch", index=0, device=0
     ControlAmp: chs=3, dir=In, idx=0, ofs=0
     Control: name="Beep Playback Volume", index=0, device=0
     ControlAmp: chs=3, dir=In, idx=4, ofs=0
     Control: name="Beep Playback Switch", index=0, device=0
     ControlAmp: chs=3, dir=In, idx=4, ofs=0
     Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
     Amp-In vals: [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80
     0x80]
     Connection: 5
     0x18 0x19 0x1a 0x1b 0x1d
     Node 0x0c [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
     Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
     Amp-In vals: [0x00 0x00] [0x80 0x80]
     Connection: 2
     0x02 0x0b
     Node 0x0d [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
     Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
     Amp-In vals: [0x00 0x00] [0x80 0x80]
     Connection: 2
     0x03 0x0b
     Node 0x0e [Vendor Defined Widget] wcaps 0xf00000: Mono
     Node 0x0f [Audio Mixer] wcaps 0x20010a: Mono Amp-In
     Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
     Amp-In vals: [0x00] [0x80]
     Connection: 2
     0x02 0x0b
     Node 0x10 [Vendor Defined Widget] wcaps 0xf00000: Mono
     Node 0x11 [Vendor Defined Widget] wcaps 0xf00000: Mono
     Node 0x12 [Pin Complex] wcaps 0x40000b: Stereo Amp-In
     Control: name="Internal Mic Boost Volume", index=0, device=0
     ControlAmp: chs=3, dir=In, idx=0, ofs=0
     Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x2f, mute=0
     Amp-In vals: [0x00 0x00]
     Pincap 0x00000020: IN
     Pin Default 0x99a30930: [Fixed] Mic at Int ATAPI
     Conn = ATAPI, Color = Unknown
     DefAssociation = 0x3, Sequence = 0x0
     Misc = NO_PRESENCE
     Pin-ctls: 0x20: IN
     Node 0x13 [Vendor Defined Widget] wcaps 0xf00000: Mono
     Node 0x14 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
     Control: name="Speaker Playback Switch", index=0, device=0
     ControlAmp: chs=3, dir=Out, idx=0, ofs=0
     Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
     Amp-Out vals: [0x00 0x00]
     Pincap 0x00010014: OUT EAPD Detect
     EAPD 0x2: EAPD
     Pin Default 0x99130110: [Fixed] Speaker at Int ATAPI
     Conn = ATAPI, Color = Unknown
     DefAssociation = 0x1, Sequence = 0x0
     Misc = NO_PRESENCE
     Pin-ctls: 0x40: OUT
     Unsolicited: tag=00, enabled=0
     Connection: 2
     0x0c 0x0d*
     Node 0x15 [Vendor Defined Widget] wcaps 0xf00000: Mono
     Node 0x16 [Vendor Defined Widget] wcaps 0xf00000: Mono
     Node 0x17 [Pin Complex] wcaps 0x40010c: Mono Amp-Out
     Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
     Amp-Out vals: [0x80]
     Pincap 0x00000010: OUT
     Pin Default 0x411111f0: [N/A] Speaker at Ext Rear
     Conn = 1/8, Color = Black
     DefAssociation = 0xf, Sequence = 0x0
     Misc = NO_PRESENCE
     Pin-ctls: 0x00:
     Connection: 1
     0x0f
     Node 0x18 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
     Control: name="Mic Boost Volume", index=0, device=0
     ControlAmp: chs=3, dir=In, idx=0, ofs=0
     Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x2f, mute=0
     Amp-In vals: [0x00 0x00]
     Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
     Amp-Out vals: [0x80 0x80]
     Pincap 0x00001734: IN OUT Detect
     Vref caps: HIZ 50 GRD 80
     Pin Default 0x03a19840: [Jack] Mic at Ext Left
     Conn = 1/8, Color = Pink
     DefAssociation = 0x4, Sequence = 0x0
     Pin-ctls: 0x24: IN VREF_80
     Unsolicited: tag=02, enabled=1
     Connection: 1
     0x0d
     Node 0x19 [Pin Complex] wcaps 0x40008b: Stereo Amp-In
     Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x2f, mute=0
     Amp-In vals: [0x00 0x00]
     Pincap 0x00001724: IN Detect
     Vref caps: HIZ 50 GRD 80
     Pin Default 0x411111f0: [N/A] Speaker at Ext Rear
     Conn = 1/8, Color = Black
     DefAssociation = 0xf, Sequence = 0x0
     Misc = NO_PRESENCE
     Pin-ctls: 0x20: IN VREF_HIZ
     Unsolicited: tag=00, enabled=0
     Node 0x1a [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
     Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x2f, mute=0
     Amp-In vals: [0x00 0x00]
     Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
     Amp-Out vals: [0x80 0x80]
     Pincap 0x0000003c: IN OUT HP Detect
     Pin Default 0x411111f0: [N/A] Speaker at Ext Rear
     Conn = 1/8, Color = Black
     DefAssociation = 0xf, Sequence = 0x0
     Misc = NO_PRESENCE
     Pin-ctls: 0x20: IN
     Unsolicited: tag=00, enabled=0
     Connection: 2
     0x0c* 0x0d
     Node 0x1b [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
     Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x2f, mute=0
     Amp-In vals: [0x00 0x00]
     Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
     Amp-Out vals: [0x80 0x80]
     Pincap 0x00000034: IN OUT Detect
     Pin Default 0x411111f0: [N/A] Speaker at Ext Rear
     Conn = 1/8, Color = Black
     DefAssociation = 0xf, Sequence = 0x0
     Misc = NO_PRESENCE
     Pin-ctls: 0x20: IN
     Unsolicited: tag=00, enabled=0
     Connection: 2
     0x0c* 0x0d
     Node 0x1c [Vendor Defined Widget] wcaps 0xf00000: Mono
     Node 0x1d [Pin Complex] wcaps 0x400000: Mono
     Pincap 0x00000020: IN
     Pin Default 0x4017992d: [N/A] Speaker at Ext N/A
     Conn = Analog, Color = Pink
     DefAssociation = 0x2, Sequence = 0xd
     Misc = NO_PRESENCE
     Pin-ctls: 0x20: IN
     Node 0x1e [Pin Complex] wcaps 0x400381: Stereo Digital
     Pincap 0x00000014: OUT Detect
     Pin Default 0x03451120: [Jack] SPDIF Out at Ext Left
     Conn = Optical, Color = Black
     DefAssociation = 0x2, Sequence = 0x0
     Misc = NO_PRESENCE
     Pin-ctls: 0x40: OUT
     Unsolicited: tag=00, enabled=0
     Connection: 1
     0x06
     Node 0x1f [Vendor Defined Widget] wcaps 0xf00000: Mono
     Node 0x20 [Vendor Defined Widget] wcaps 0xf00040: Mono
     Processing caps: benign=0, ncoeff=25
     Node 0x21 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
     Control: name="Headphone Playback Switch", index=0, device=0
     ControlAmp: chs=3, dir=Out, idx=0, ofs=0
     Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
     Amp-Out vals: [0x80 0x80]
     Pincap 0x0000001c: OUT HP Detect
     Pin Default 0x0321101f: [Jack] HP Out at Ext Left
     Conn = 1/8, Color = Black
     DefAssociation = 0x1, Sequence = 0xf
     Pin-ctls: 0xc0: OUT HP
     Unsolicited: tag=01, enabled=1
     Connection: 2
     0x0c* 0x0d
     Node 0x22 [Audio Selector] wcaps 0x30010b: Stereo Amp-In
     Amp-In caps: N/A
     Amp-In vals: [0x00 0x00] [0x00 0x00] [0x00 0x00] [0x00 0x00] [0x00
     0x00] [0x00 0x00] [0x00 0x00]
     Connection: 7
     0x18 0x19 0x1a 0x1b 0x1d 0x0b 0x12*
     Node 0x23 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
     Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
     Amp-In vals: [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80
     0x80] [0x80 0x80]
     Connection: 6
     0x18 0x19 0x1a 0x1b 0x1d 0x0b
     Codec: Nvidia Generic
     Address: 0
     AFG Function Id: 0x1 (unsol 0)
     Vendor Id: 0x10de000a
     Subsystem Id: 0x10de0101
     Revision Id: 0x100100
     No Modem Function Group found
     Default PCM:
     rates [0x0]:
     bits [0x0]:
     formats [0x0]:
     Default Amp-In caps: N/A
     Default Amp-Out caps: N/A
     State of AFG node 0x01:
     Power states: D0 D1 D2 D3
     Power: setting=D0, actual=D0
     GPIO: io=0, o=0, i=0, unsolicited=0, wake=0
     Node 0x04 [Audio Output] wcaps 0x72b1: 8-Channels Digital Stripe CP
     Control: name="IEC958 Playback Con Mask", index=0, device=0
     Control: name="IEC958 Playback Pro Mask", index=0, device=0
     Control: name="IEC958 Playback Default", index=0, device=0
     Control: name="IEC958 Playback Switch", index=0, device=0
     Device: name="Generic Digital", type="HDMI", device=3
     Converter: stream=0, channel=0
     Digital: Enabled
     Digital category: 0x0
     IEC Coding Type: 0x0
     PCM:
     rates [0x7f0]: 32000 44100 48000 88200 96000 176400 192000
     bits [0xe]: 16 20 24
     formats [0x5]: PCM AC3
     Unsolicited: tag=00, enabled=0
     Node 0x05 [Pin Complex] wcaps 0x407381: 8-Channels Digital CP
     Pincap 0x09000094: OUT Detect HBR HDMI DP
     Pin Default 0x18560010: [Jack] Digital Out at Int HDMI
     Conn = Digital, Color = Unknown
     DefAssociation = 0x1, Sequence = 0x0
     Pin-ctls: 0x40: OUT
     Unsolicited: tag=01, enabled=1
     Connection: 1
     0x04
     Codec: Nvidia Generic
     Address: 1
     AFG Function Id: 0x1 (unsol 0)
     Vendor Id: 0x10de000a
     Subsystem Id: 0x10de0101
     Revision Id: 0x100100
     No Modem Function Group found
     Default PCM:
     rates [0x0]:
     bits [0x0]:
     formats [0x0]:
     Default Amp-In caps: N/A
     Default Amp-Out caps: N/A
     State of AFG node 0x01:
     Power states: D0 D1 D2 D3
     Power: setting=D0, actual=D0
     GPIO: io=0, o=0, i=0, unsolicited=0, wake=0
     Node 0x04 [Audio Output] wcaps 0x72b1: 8-Channels Digital Stripe CP
     Control: name="IEC958 Playback Con Mask", index=1, device=0
     Control: name="IEC958 Playback Pro Mask", index=1, device=0
     Control: name="IEC958 Playback Default", index=1, device=0
     Control: name="IEC958 Playback Switch", index=1, device=0
     Device: name="Generic Digital", type="HDMI", device=7
     Converter: stream=0, channel=0
     Digital: Enabled
     Digital category: 0x0
     IEC Coding Type: 0x0
     PCM:
     rates [0x7f0]: 32000 44100 48000 88200 96000 176400 192000
     bits [0xe]: 16 20 24
     formats [0x5]: PCM AC3
     Unsolicited: tag=00, enabled=0
     Node 0x05 [Pin Complex] wcaps 0x407381: 8-Channels Digital CP
     Pincap 0x09000094: OUT Detect HBR HDMI DP
     Pin Default 0x18560010: [Jack] Digital Out at Int HDMI
     Conn = Digital, Color = Unknown
     DefAssociation = 0x1, Sequence = 0x0
     Pin-ctls: 0x40: OUT
     Unsolicited: tag=01, enabled=1
     Connection: 1
     0x04
     Codec: Nvidia Generic
     Address: 2
     AFG Function Id: 0x1 (unsol 0)
     Vendor Id: 0x10de000a
     Subsystem Id: 0x10de0101
     Revision Id: 0x100100
     No Modem Function Group found
     Default PCM:
     rates [0x0]:
     bits [0x0]:
     formats [0x0]:
     Default Amp-In caps: N/A
     Default Amp-Out caps: N/A
     State of AFG node 0x01:
     Power states: D0 D1 D2 D3
     Power: setting=D0, actual=D0
     GPIO: io=0, o=0, i=0, unsolicited=0, wake=0
     Node 0x04 [Audio Output] wcaps 0x72b1: 8-Channels Digital Stripe CP
     Control: name="IEC958 Playback Con Mask", index=2, device=0
     Control: name="IEC958 Playback Pro Mask", index=2, device=0
     Control: name="IEC958 Playback Default", index=2, device=0
     Control: name="IEC958 Playback Switch", index=2, device=0
     Device: name="Generic Digital", type="HDMI", device=8
     Converter: stream=0, channel=0
     Digital: Enabled
     Digital category: 0x0
     IEC Coding Type: 0x0
     PCM:
     rates [0x7f0]: 32000 44100 48000 88200 96000 176400 192000
     bits [0xe]: 16 20 24
     formats [0x5]: PCM AC3
     Unsolicited: tag=00, enabled=0
     Node 0x05 [Pin Complex] wcaps 0x407381: 8-Channels Digital CP
     Pincap 0x09000094: OUT Detect HBR HDMI DP
     Pin Default 0x18560010: [Jack] Digital Out at Int HDMI
     Conn = Digital, Color = Unknown
     DefAssociation = 0x1, Sequence = 0x0
     Pin-ctls: 0x40: OUT
     Unsolicited: tag=01, enabled=1
     Connection: 1
     0x04
     Codec: Nvidia Generic
     Address: 3
     AFG Function Id: 0x1 (unsol 0)
     Vendor Id: 0x10de000a
     Subsystem Id: 0x10de0101
     Revision Id: 0x100100
     No Modem Function Group found
     Default PCM:
     rates [0x0]:
     bits [0x0]:
     formats [0x0]:
     Default Amp-In caps: N/A
     Default Amp-Out caps: N/A
     State of AFG node 0x01:
     Power states: D0 D1 D2 D3
     Power: setting=D0, actual=D0
     GPIO: io=0, o=0, i=0, unsolicited=0, wake=0
     Node 0x04 [Audio Output] wcaps 0x72b1: 8-Channels Digital Stripe CP
     Control: name="IEC958 Playback Con Mask", index=3, device=0
     Control: name="IEC958 Playback Pro Mask", index=3, device=0
     Control: name="IEC958 Playback Default", index=3, device=0
     Control: name="IEC958 Playback Switch", index=3, device=0
     Device: name="Generic Digital", type="HDMI", device=9
     Converter: stream=5, channel=0
     Digital: Enabled
     Digital category: 0x0
     IEC Coding Type: 0x0
     PCM:
     rates [0x7f0]: 32000 44100 48000 88200 96000 176400 192000
     bits [0xe]: 16 20 24
     formats [0x5]: PCM AC3
     Unsolicited: tag=00, enabled=0
     Node 0x05 [Pin Complex] wcaps 0x407381: 8-Channels Digital CP
     Pincap 0x09000094: OUT Detect HBR HDMI DP
     Pin Default 0x18560010: [Jack] Digital Out at Int HDMI
     Conn = Digital, Color = Unknown
     DefAssociation = 0x1, Sequence = 0x0
     Pin-ctls: 0x40: OUT
     Unsolicited: tag=01, enabled=1
     Connection: 1
     0x04
     --endcollapse--
!!USB Mixer information
     !!---------------------
     --startcollapse--
USB Mixer: usb_id=0x06f8b121, ctrlif=0, ctlerr=0
     Card: Guillemot Corporation Hercules P32 DJ at usb-0000:00:1d.0-1.4,
     full speed
     Unit: 2
     Control: name="PCM Playback Volume", index=0
     Info: id=2, control=2, cmask=0xf, channels=4, type="S16"
     Volume: min=-25600, max=0, dBmin=-10000, dBmax=0
     Unit: 2
     Control: name="PCM Playback Switch", index=0
     Info: id=2, control=1, cmask=0xf, channels=4, type="INV_BOOLEAN"
     Volume: min=0, max=1, dBmin=0, dBmax=0
     --endcollapse--
!!ALSA Device nodes
     !!-----------------
crw-rw----. 1 root audio 116, 6 Mar 20 18:15 /dev/snd/controlC0
     crw-rw----. 1 root audio 116, 15 Mar 20 18:15 /dev/snd/controlC1
     crw-rw----. 1 root audio 116, 18 Mar 20 21:25 /dev/snd/controlC2
     crw-rw----. 1 root audio 116, 5 Mar 20 18:15 /dev/snd/hwC0D0
     crw-rw----. 1 root audio 116, 11 Mar 20 18:15 /dev/snd/hwC1D0
     crw-rw----. 1 root audio 116, 12 Mar 20 18:15 /dev/snd/hwC1D1
     crw-rw----. 1 root audio 116, 13 Mar 20 18:15 /dev/snd/hwC1D2
     crw-rw----. 1 root audio 116, 14 Mar 20 18:15 /dev/snd/hwC1D3
     crw-rw----. 1 root audio 116, 17 Mar 20 21:25 /dev/snd/midiC2D0
     crw-rw----. 1 root audio 116, 3 Mar 20 19:58 /dev/snd/pcmC0D0c
     crw-rw----. 1 root audio 116, 2 Mar 20 20:40 /dev/snd/pcmC0D0p
     crw-rw----. 1 root audio 116, 4 Mar 20 19:58 /dev/snd/pcmC0D1p
     crw-rw----. 1 root audio 116, 7 Mar 20 19:58 /dev/snd/pcmC1D3p
     crw-rw----. 1 root audio 116, 8 Mar 20 19:58 /dev/snd/pcmC1D7p
     crw-rw----. 1 root audio 116, 9 Mar 20 19:58 /dev/snd/pcmC1D8p
     crw-rw----. 1 root audio 116, 10 Mar 20 19:58 /dev/snd/pcmC1D9p
     crw-rw----. 1 root audio 116, 16 Mar 20 21:32 /dev/snd/pcmC2D0p
     crw-rw----. 1 root audio 116, 1 Mar 20 17:19 /dev/snd/seq
     crw-rw----. 1 root audio 116, 33 Mar 20 18:15 /dev/snd/timer
/dev/snd/by-id:
     total 0
     drwxr-xr-x. 2 root root 60 Mar 20 21:25 .
     drwxr-xr-x. 4 root root 460 Mar 20 21:25 ..
     lrwxrwxrwx. 1 root root 12 Mar 20 21:25 usb-
     Guillemot_Corporation_Hercules_P32_DJ-00 -> ../controlC2
/dev/snd/by-path:
     total 0
     drwxr-xr-x. 2 root root 100 Mar 20 21:25 .
     drwxr-xr-x. 4 root root 460 Mar 20 21:25 ..
     lrwxrwxrwx. 1 root root 12 Mar 20 18:15 pci-0000:00:1b.0 ->
     ../controlC0
     lrwxrwxrwx. 1 root root 12 Mar 20 21:25
     pci-0000:00:1d.0-usb-0:1.4:1.0
     -> ../controlC2
     lrwxrwxrwx. 1 root root 12 Mar 20 18:15 pci-0000:01:00.1 ->
     ../controlC1
!!Aplay/Arecord output
     !!--------------------
APLAY
**** List of PLAYBACK Hardware Devices ****
     card 0: MID [HDA Intel MID], device 0: ALC269VB Analog [ALC269VB
     Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
     card 0: MID [HDA Intel MID], device 1: ALC269VB Digital [ALC269VB
     Digital]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
     card 1: NVidia [HDA NVidia], device 3: Generic Digital [Generic
     Digital]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
     card 1: NVidia [HDA NVidia], device 7: Generic Digital [Generic
     Digital]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
     card 1: NVidia [HDA NVidia], device 8: Generic Digital [Generic
     Digital]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
     card 1: NVidia [HDA NVidia], device 9: Generic Digital [Generic
     Digital]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
     card 2: DJ [Hercules P32 DJ], device 0: USB Audio [USB Audio]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
ARECORD
**** List of CAPTURE Hardware Devices ****
     card 0: MID [HDA Intel MID], device 0: ALC269VB Analog [ALC269VB
     Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
!!Amixer output
     !!-------------
!!-------Mixer controls for card 0 [MID]
Card hw:0 'MID'/'HDA Intel MID at 0xb7100000 irq 27'
     Mixer name : 'Realtek ALC269VB'
     Components : 'HDA:10ec0269,1025035b,00100100'
     Controls : 31
     Simple ctrls : 14
     Simple mixer control 'Master',0
     Capabilities: pvolume pvolume-joined pswitch pswitch-joined
     Playback channels: Mono
     Limits: Playback 0 - 87
     Mono: Playback 81 [93%] [-4.50dB] [on]
     Simple mixer control 'Headphone',0
     Capabilities: pvolume pswitch
     Playback channels: Front Left - Front Right
     Limits: Playback 0 - 87
     Mono:
     Front Left: Playback 0 [0%] [-65.25dB] [off]
     Front Right: Playback 0 [0%] [-65.25dB] [off]
     Simple mixer control 'Speaker',0
     Capabilities: pvolume pswitch
     Playback channels: Front Left - Front Right
     Limits: Playback 0 - 87
     Mono:
     Front Left: Playback 87 [100%] [0.00dB] [on]
     Front Right: Playback 87 [100%] [0.00dB] [on]
     Simple mixer control 'PCM',0
     Capabilities: pvolume
     Playback channels: Front Left - Front Right
     Limits: Playback 0 - 255
     Mono:
     Front Left: Playback 128 [50%] [-25.40dB]
     Front Right: Playback 128 [50%] [-25.40dB]
     Simple mixer control 'Mic',0
     Capabilities: pvolume pswitch
     Playback channels: Front Left - Front Right
     Limits: Playback 0 - 31
     Mono:
     Front Left: Playback 0 [0%] [-34.50dB] [off]
     Front Right: Playback 0 [0%] [-34.50dB] [off]
     Simple mixer control 'Mic Boost',0
     Capabilities: volume
     Playback channels: Front Left - Front Right
     Capture channels: Front Left - Front Right
     Limits: 0 - 3
     Front Left: 0 [0%] [0.00dB]
     Front Right: 0 [0%] [0.00dB]
     Simple mixer control 'IEC958',0
     Capabilities: pswitch pswitch-joined
     Playback channels: Mono
     Mono: Playback [off]
     Simple mixer control 'IEC958 Default PCM',0
     Capabilities: pswitch pswitch-joined
     Playback channels: Mono
     Mono: Playback [on]
     Simple mixer control 'Beep',0
     Capabilities: pvolume pswitch
     Playback channels: Front Left - Front Right
     Limits: Playback 0 - 31
     Mono:
     Front Left: Playback 0 [0%] [-34.50dB] [off]
     Front Right: Playback 0 [0%] [-34.50dB] [off]
     Simple mixer control 'Capture',0
     Capabilities: cvolume cswitch
     Capture channels: Front Left - Front Right
     Limits: Capture 0 - 31
     Front Left: Capture 0 [0%] [-16.50dB] [on]
     Front Right: Capture 0 [0%] [-16.50dB] [on]
     Simple mixer control 'Auto-Mute Mode',0
     Capabilities: enum
     Items: 'Disabled' 'Enabled'
     Item0: 'Enabled'
     Simple mixer control 'Digital',0
     Capabilities: cvolume
     Capture channels: Front Left - Front Right
     Limits: Capture 0 - 120
     Front Left: Capture 60 [50%] [0.00dB]
     Front Right: Capture 60 [50%] [0.00dB]
     Simple mixer control 'Internal Mic Boost',0
     Capabilities: volume
     Playback channels: Front Left - Front Right
     Capture channels: Front Left - Front Right
     Limits: 0 - 3
     Front Left: 0 [0%] [0.00dB]
     Front Right: 0 [0%] [0.00dB]
     Simple mixer control 'Loopback Mixing',0
     Capabilities: enum
     Items: 'Disabled' 'Enabled'
     Item0: 'Disabled'
!!-------Mixer controls for card 1 [NVidia]
Card hw:1 'NVidia'/'HDA NVidia at 0xb3000000 irq 16'
     Mixer name : 'Nvidia Generic'
     Components : 'HDA:10de000a,10de0101,00100100'
     Controls : 24
     Simple ctrls : 4
     Simple mixer control 'IEC958',0
     Capabilities: pswitch pswitch-joined
     Playback channels: Mono
     Mono: Playback [on]
     Simple mixer control 'IEC958',1
     Capabilities: pswitch pswitch-joined
     Playback channels: Mono
     Mono: Playback [on]
     Simple mixer control 'IEC958',2
     Capabilities: pswitch pswitch-joined
     Playback channels: Mono
     Mono: Playback [on]
     Simple mixer control 'IEC958',3
     Capabilities: pswitch pswitch-joined
     Playback channels: Mono
     Mono: Playback [on]
!!-------Mixer controls for card 2 [DJ]
Card hw:2 'DJ'/'Guillemot Corporation Hercules P32 DJ at usb-
     0000:00:1d.0-1.4, full speed'
     Mixer name : 'USB Mixer'
     Components : 'USB06f8:b121'
     Controls : 4
     Simple ctrls : 1
     Simple mixer control 'PCM',0
     Capabilities: pvolume pswitch
     Playback channels: Front Left - Front Right - Rear Left - Rear Right
     Limits: Playback 0 - 400
     Mono:
     Front Left: Playback 320 [80%] [-20.00dB] [on]
     Front Right: Playback 320 [80%] [-20.00dB] [on]
     Rear Left: Playback 320 [80%] [-20.00dB] [on]
     Rear Right: Playback 320 [80%] [-20.00dB] [on]
!!Alsactl output
     !!--------------
--startcollapse--
     state.MID {
     control.1 {
     iface MIXER
     name 'Headphone Playback Volume'
     value.0 0
     value.1 0
     comment {
     access 'read write'
     type INTEGER
     count 2
     range '0 - 87'
     dbmin -6525
     dbmax 0
     dbvalue.0 -6525
     dbvalue.1 -6525
     }
     }
     control.2 {
     iface MIXER
     name 'Headphone Playback Switch'
     value.0 false
     value.1 false
     comment {
     access 'read write'
     type BOOLEAN
     count 2
     }
     }
     control.3 {
     iface MIXER
     name 'Speaker Playback Volume'
     value.0 87
     value.1 87
     comment {
     access 'read write'
     type INTEGER
     count 2
     range '0 - 87'
     dbmin -6525
     dbmax 0
     dbvalue.0 0
     dbvalue.1 0
     }
     }
     control.4 {
     iface MIXER
     name 'Speaker Playback Switch'
     value.0 true
     value.1 true
     comment {
     access 'read write'
     type BOOLEAN
     count 2
     }
     }
     control.5 {
     iface MIXER
     name 'Loopback Mixing'
     value Disabled
     comment {
     access 'read write'
     type ENUMERATED
     count 1
     item.0 Disabled
     item.1 Enabled
     }
     }
     control.6 {
     iface MIXER
     name 'Mic Playback Volume'
     value.0 0
     value.1 0
     comment {
     access 'read write'
     type INTEGER
     count 2
     range '0 - 31'
     dbmin -3450
     dbmax 1200
     dbvalue.0 -3450
     dbvalue.1 -3450
     }
     }
     control.7 {
     iface MIXER
     name 'Mic Playback Switch'
     value.0 false
     value.1 false
     comment {
     access 'read write'
     type BOOLEAN
     count 2
     }
     }
     control.8 {
     iface MIXER
     name 'Auto-Mute Mode'
     value Enabled
     comment {
     access 'read write'
     type ENUMERATED
     count 1
     item.0 Disabled
     item.1 Enabled
     }
     }
     control.9 {
     iface MIXER
     name 'Capture Volume'
     value.0 0
     value.1 0
     comment {
     access 'read write'
     type INTEGER
     count 2
     range '0 - 31'
     dbmin -1650
     dbmax 3000
     dbvalue.0 -1650
     dbvalue.1 -1650
     }
     }
     control.10 {
     iface MIXER
     name 'Capture Switch'
     value.0 true
     value.1 true
     comment {
     access 'read write'
     type BOOLEAN
     count 2
     }
     }
     control.11 {
     iface MIXER
     name 'Mic Boost Volume'
     value.0 0
     value.1 0
     comment {
     access 'read write'
     type INTEGER
     count 2
     range '0 - 3'
     dbmin 0
     dbmax 3600
     dbvalue.0 0
     dbvalue.1 0
     }
     }
     control.12 {
     iface MIXER
     name 'Internal Mic Boost Volume'
     value.0 0
     value.1 0
     comment {
     access 'read write'
     type INTEGER
     count 2
     range '0 - 3'
     dbmin 0
     dbmax 3600
     dbvalue.0 0
     dbvalue.1 0
     }
     }
     control.13 {
     iface MIXER
     name 'Beep Playback Volume'
     value.0 0
     value.1 0
     comment {
     access 'read write'
     type INTEGER
     count 2
     range '0 - 31'
     dbmin -3450
     dbmax 1200
     dbvalue.0 -3450
     dbvalue.1 -3450
     }
     }
     control.14 {
     iface MIXER
     name 'Beep Playback Switch'
     value.0 false
     value.1 false
     comment {
     access 'read write'
     type BOOLEAN
     count 2
     }
     }
     control.15 {
     iface MIXER
     name 'IEC958 Playback Con Mask'
     value
     '0fff000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     0'
     comment {
     access read
     type IEC958
     count 1
     }
     }
     control.16 {
     iface MIXER
     name 'IEC958 Playback Pro Mask'
     value
     '0f00000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     0'
     comment {
     access read
     type IEC958
     count 1
     }
     }
     control.17 {
     iface MIXER
     name 'IEC958 Playback Default'
     value
     '0400000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     0'
     comment {
     access 'read write'
     type IEC958
     count 1
     }
     }
     control.18 {
     iface MIXER
     name 'IEC958 Playback Switch'
     value false
     comment {
     access 'read write'
     type BOOLEAN
     count 1
     }
     }
     control.19 {
     iface MIXER
     name 'IEC958 Default PCM Playback Switch'
     value true
     comment {
     access 'read write'
     type BOOLEAN
     count 1
     }
     }
     control.20 {
     iface MIXER
     name 'Master Playback Volume'
     value 81
     comment {
     access 'read write'
     type INTEGER
     count 1
     range '0 - 87'
     dbmin -6525
     dbmax 0
     dbvalue.0 -450
     }
     }
     control.21 {
     iface MIXER
     name 'Master Playback Switch'
     value true
     comment {
     access 'read write'
     type BOOLEAN
     count 1
     }
     }
     control.22 {
     iface CARD
     name 'Mic Jack'
     value false
     comment {
     access read
     type BOOLEAN
     count 1
     }
     }
     control.23 {
     iface CARD
     name 'Internal Mic Phantom Jack'
     value true
     comment {
     access read
     type BOOLEAN
     count 1
     }
     }
     control.24 {
     iface CARD
     name 'Headphone Jack'
     value false
     comment {
     access read
     type BOOLEAN
     count 1
     }
     }
     control.25 {
     iface CARD
     name 'Speaker Phantom Jack'
     value true
     comment {
     access read
     type BOOLEAN
     count 1
     }
     }
     control.26 {
     iface CARD
     name 'SPDIF Phantom Jack'
     value true
     comment {
     access read
     type BOOLEAN
     count 1
     }
     }
     control.27 {
     iface PCM
     name 'Playback Channel Map'
     value.0 0
     value.1 0
     comment {
     access read
     type INTEGER
     count 2
     range '0 - 36'
     }
     }
     control.28 {
     iface PCM
     name 'Capture Channel Map'
     value.0 0
     value.1 0
     comment {
     access read
     type INTEGER
     count 2
     range '0 - 36'
     }
     }
     control.29 {
     iface PCM
     device 1
     name 'Playback Channel Map'
     value.0 0
     value.1 0
     comment {
     access read
     type INTEGER
     count 2
     range '0 - 36'
     }
     }
     control.30 {
     iface MIXER
     name 'PCM Playback Volume'
     value.0 128
     value.1 128
     comment {
     access 'read write user'
     type INTEGER
     count 2
     range '0 - 255'
     tlv '0000000100000008ffffec1400000014'
     dbmin -5100
     dbmax 0
     dbvalue.0 -2540
     dbvalue.1 -2540
     }
     }
     control.31 {
     iface MIXER
     name 'Digital Capture Volume'
     value.0 60
     value.1 60
     comment {
     access 'read write user'
     type INTEGER
     count 2
     range '0 - 120'
     tlv '0000000100000008fffff44800000032'
     dbmin -3000
     dbmax 3000
     dbvalue.0 0
     dbvalue.1 0
     }
     }
     }
     state.NVidia {
     control.1 {
     iface MIXER
     name 'IEC958 Playback Con Mask'
     value
     '0fff000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     0'
     comment {
     access read
     type IEC958
     count 1
     }
     }
     control.2 {
     iface MIXER
     name 'IEC958 Playback Pro Mask'
     value
     '0f00000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     0'
     comment {
     access read
     type IEC958
     count 1
     }
     }
     control.3 {
     iface MIXER
     name 'IEC958 Playback Default'
     value
     '0400000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     0'
     comment {
     access 'read write'
     type IEC958
     count 1
     }
     }
     control.4 {
     iface MIXER
     name 'IEC958 Playback Switch'
     value true
     comment {
     access 'read write'
     type BOOLEAN
     count 1
     }
     }
     control.5 {
     iface CARD
     name 'HDMI Jack'
     value false
     comment {
     access read
     type BOOLEAN
     count 1
     }
     }
     control.6 {
     iface PCM
     device 3
     name 'Playback Channel Map'
     value.0 0
     value.1 0
     comment {
     access read
     type INTEGER
     count 2
     range '0 - 36'
     }
     }
     control.7 {
     iface MIXER
     name 'IEC958 Playback Con Mask'
     index 1
     value
     '0fff000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     0'
     comment {
     access read
     type IEC958
     count 1
     }
     }
     control.8 {
     iface MIXER
     name 'IEC958 Playback Pro Mask'
     index 1
     value
     '0f00000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     0'
     comment {
     access read
     type IEC958
     count 1
     }
     }
     control.9 {
     iface MIXER
     name 'IEC958 Playback Default'
     index 1
     value
     '0400000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     0'
     comment {
     access 'read write'
     type IEC958
     count 1
     }
     }
     control.10 {
     iface MIXER
     name 'IEC958 Playback Switch'
     index 1
     value true
     comment {
     access 'read write'
     type BOOLEAN
     count 1
     }
     }
     control.11 {
     iface CARD
     name 'HDMI Jack'
     index 1
     value false
     comment {
     access read
     type BOOLEAN
     count 1
     }
     }
     control.12 {
     iface PCM
     device 7
     name 'Playback Channel Map'
     value.0 0
     value.1 0
     comment {
     access read
     type INTEGER
     count 2
     range '0 - 36'
     }
     }
     control.13 {
     iface MIXER
     name 'IEC958 Playback Con Mask'
     index 2
     value
     '0fff000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     0'
     comment {
     access read
     type IEC958
     count 1
     }
     }
     control.14 {
     iface MIXER
     name 'IEC958 Playback Pro Mask'
     index 2
     value
     '0f00000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     0'
     comment {
     access read
     type IEC958
     count 1
     }
     }
     control.15 {
     iface MIXER
     name 'IEC958 Playback Default'
     index 2
     value
     '0400000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     0'
     comment {
     access 'read write'
     type IEC958
     count 1
     }
     }
     control.16 {
     iface MIXER
     name 'IEC958 Playback Switch'
     index 2
     value true
     comment {
     access 'read write'
     type BOOLEAN
     count 1
     }
     }
     control.17 {
     iface CARD
     name 'HDMI Jack'
     index 2
     value false
     comment {
     access read
     type BOOLEAN
     count 1
     }
     }
     control.18 {
     iface PCM
     device 8
     name 'Playback Channel Map'
     value.0 0
     value.1 0
     comment {
     access read
     type INTEGER
     count 2
     range '0 - 36'
     }
     }
     control.19 {
     iface MIXER
     name 'IEC958 Playback Con Mask'
     index 3
     value
     '0fff000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     0'
     comment {
     access read
     type IEC958
     count 1
     }
     }
     control.20 {
     iface MIXER
     name 'IEC958 Playback Pro Mask'
     index 3
     value
     '0f00000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     0'
     comment {
     access read
     type IEC958
     count 1
     }
     }
     control.21 {
     iface MIXER
     name 'IEC958 Playback Default'
     index 3
     value
     '0400000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     000
     00000000000000000000000000000000000000000000000000000000000000000000
     0'
     comment {
     access 'read write'
     type IEC958
     count 1
     }
     }
     control.22 {
     iface MIXER
     name 'IEC958 Playback Switch'
     index 3
     value true
     comment {
     access 'read write'
     type BOOLEAN
     count 1
     }
     }
     control.23 {
     iface CARD
     name 'HDMI Jack'
     index 3
     value false
     comment {
     access read
     type BOOLEAN
     count 1
     }
     }
     control.24 {
     iface PCM
     device 9
     name 'Playback Channel Map'
     value.0 0
     value.1 0
     comment {
     access read
     type INTEGER
     count 2
     range '0 - 36'
     }
     }
     }
     state.DJ {
     control.1 {
     iface PCM
     name 'Playback Channel Map'
     value.0 0
     value.1 0
     value.2 0
     value.3 0
     comment {
     access read
     type INTEGER
     count 4
     range '0 - 36'
     }
     }
     control.2 {
     iface MIXER
     name 'PCM Playback Switch'
     value.0 true
     value.1 true
     value.2 true
     value.3 true
     comment {
     access 'read write'
     type BOOLEAN
     count 4
     }
     }
     control.3 {
     iface MIXER
     name 'PCM Playback Volume'
     value.0 320
     value.1 320
     value.2 320
     value.3 320
     comment {
     access 'read write'
     type INTEGER
     count 4
     range '0 - 400'
     dbmin -10000
     dbmax 0
     dbvalue.0 -2000
     dbvalue.1 -2000
     dbvalue.2 -2000
     dbvalue.3 -2000
     }
     }
     control.4 {
     iface CARD
     name 'Keep Interface'
     value false
     comment {
     access 'read write'
     type BOOLEAN
     count 1
     }
     }
     }
     --endcollapse--
!!All Loaded Modules
     !!------------------
Module
     snd_hrtimer
     snd_seq_midi
     snd_seq_dummy
     snd_seq_midi_event
     snd_seq
     snd_pcm_oss
     snd_mixer_oss
     xt_iprange
     ipv6
     crc_ccitt
     arc4
     brcmsmac
     cordic
     brcmutil
     mac80211
     sha256_ssse3
     snd_usb_audio
     snd_usbmidi_lib
     sha256_generic
     snd_rawmidi
     cfg80211
     snd_seq_device
     iTCO_wdt
     iTCO_vendor_support
     snd_hda_codec_realtek
     snd_hda_codec_generic
     ledtrig_audio
     snd_hda_intel
     joydev
     snd_hda_codec
     acer_wmi
     sparse_keymap
     bcma
     snd_hda_core
     rfkill
     pcc_cpufreq
     snd_hwdep
     acpi_cpufreq
     snd_pcm
     snd_timer
     mei_me
     snd
     mei
     pcspkr
     soundcore
     lpc_ich
     i2c_i801
     mfd_core
     ums_onetouch
     usb_storage
     dm_crypt
     serio_raw
     atl1c
     nouveau
     mxm_wmi
     i2c_algo_bit
     drm_kms_helper
     syscopyarea
     sysfillrect
     sysimgblt
     fb_sys_fops
     ttm
     wmi
     video
     drm
     i2c_core
!!Sysfs Files
     !!-----------
/sys/class/sound/hwC0D0/init_pin_configs:
     0x12 0x99a30930
     0x14 0x99130110
     0x17 0x411111f0
     0x18 0x03a19840
     0x19 0x411111f0
     0x1a 0x411111f0
     0x1b 0x411111f0
     0x1d 0x4017992d
     0x1e 0x03451120
     0x21 0x0321101f
/sys/class/sound/hwC0D0/driver_pin_configs:
/sys/class/sound/hwC0D0/user_pin_configs:
/sys/class/sound/hwC0D0/init_verbs:
/sys/class/sound/hwC0D0/hints:
/sys/class/sound/hwC1D0/init_pin_configs:
     0x05 0x18560010
/sys/class/sound/hwC1D0/driver_pin_configs:
/sys/class/sound/hwC1D0/user_pin_configs:
/sys/class/sound/hwC1D0/init_verbs:
/sys/class/sound/hwC1D0/hints:
/sys/class/sound/hwC1D1/init_pin_configs:
     0x05 0x18560010
/sys/class/sound/hwC1D1/driver_pin_configs:
/sys/class/sound/hwC1D1/user_pin_configs:
/sys/class/sound/hwC1D1/init_verbs:
/sys/class/sound/hwC1D1/hints:
/sys/class/sound/hwC1D2/init_pin_configs:
     0x05 0x18560010
/sys/class/sound/hwC1D2/driver_pin_configs:
/sys/class/sound/hwC1D2/user_pin_configs:
/sys/class/sound/hwC1D2/init_verbs:
/sys/class/sound/hwC1D2/hints:
/sys/class/sound/hwC1D3/init_pin_configs:
     0x05 0x18560010
/sys/class/sound/hwC1D3/driver_pin_configs:
/sys/class/sound/hwC1D3/user_pin_configs:
/sys/class/sound/hwC1D3/init_verbs:
/sys/class/sound/hwC1D3/hints:
!!ALSA/HDA dmesg
     !!--------------
[ 0.238633] ACPI: Added _OSI(Linux-Dell-Video)
     [ 0.238779] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[ 0.238926] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics)
     --
     [ 24.240651] input: Acer WMI hotkeys as
     /devices/virtual/input/input16
     [ 24.294387] snd_hda_intel 0000:00:1b.0: enabling device (0000 ->
     0002)
     [ 24.295148] snd_hda_intel 0000:01:00.1: Disabling MSI
     [ 24.417727] snd_hda_codec_realtek hdaudioC0D0: autoconfig for
     ALC269VB: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:speaker
     [ 24.418128] snd_hda_codec_realtek hdaudioC0D0: speaker_outs=0
     (0x0/0x0/0x0/0x0/0x0)
     [ 24.418507] snd_hda_codec_realtek hdaudioC0D0: hp_outs=1
     (0x21/0x0/0x0/0x0/0x0)
     [ 24.419057] snd_hda_codec_realtek hdaudioC0D0: mono: mono_out=0x0
     [ 24.419695] snd_hda_codec_realtek hdaudioC0D0: dig-out=0x1e/0x0
     [ 24.420312] snd_hda_codec_realtek hdaudioC0D0: inputs:
     [ 24.420959] snd_hda_codec_realtek hdaudioC0D0: Mic=0x18
     [ 24.421602] snd_hda_codec_realtek hdaudioC0D0: Internal
     Mic=0x12
     [ 24.448267] input: HDA Intel MID Mic as
     /devices/pci0000:00/0000:00:1b.0/sound/card0/input17
     [ 24.448762] input: HDA Intel MID Headphone as
     /devices/pci0000:00/0000:00:1b.0/sound/card0/input18
     [ 24.517380] mei mei::55213584-9a29-4916-badf-0fb7ed682aeb:01: Could
     not read FW version
     [ 24.517783] mei mei::55213584-9a29-4916-badf-0fb7ed682aeb:01: FW
     version command failed -5
     [ 24.606385] snd_hda_codec_generic hdaudioC1D0: autoconfig for
     Generic: line_outs=0 (0x0/0x0/0x0/0x0/0x0) type:line
     [ 24.606759] snd_hda_codec_generic hdaudioC1D0: speaker_outs=0
     (0x0/0x0/0x0/0x0/0x0)
     [ 24.607115] snd_hda_codec_generic hdaudioC1D0: hp_outs=0
     (0x0/0x0/0x0/0x0/0x0)
     [ 24.607684] snd_hda_codec_generic hdaudioC1D0: mono: mono_out=0x0
     [ 24.608266] snd_hda_codec_generic hdaudioC1D0: dig-out=0x5/0x0
     [ 24.608871] snd_hda_codec_generic hdaudioC1D0: inputs:
     [ 24.684106] mce: CPU3: Core temperature above threshold, cpu clock
throttled (total events = 1)
     --
     [ 24.770560] iTCO_vendor_support: vendor-support=0
     [ 24.790526] snd_hda_codec_generic hdaudioC1D1: autoconfig for
     Generic: line_outs=0 (0x0/0x0/0x0/0x0/0x0) type:line
     [ 24.790874] snd_hda_codec_generic hdaudioC1D1: speaker_outs=0
     (0x0/0x0/0x0/0x0/0x0)
     [ 24.791202] snd_hda_codec_generic hdaudioC1D1: hp_outs=0
     (0x0/0x0/0x0/0x0/0x0)
     [ 24.791536] snd_hda_codec_generic hdaudioC1D1: mono: mono_out=0x0
     [ 24.791995] snd_hda_codec_generic hdaudioC1D1: dig-out=0x5/0x0
     [ 24.792477] snd_hda_codec_generic hdaudioC1D1: inputs:
[ 24.799553] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11
     --
     [ 24.800621] iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
     [ 24.850369] snd_hda_codec_generic hdaudioC1D2: autoconfig for
     Generic: line_outs=0 (0x0/0x0/0x0/0x0/0x0) type:line
     [ 24.850650] snd_hda_codec_generic hdaudioC1D2: speaker_outs=0
     (0x0/0x0/0x0/0x0/0x0)
     [ 24.850911] snd_hda_codec_generic hdaudioC1D2: hp_outs=0
     (0x0/0x0/0x0/0x0/0x0)
     [ 24.851165] snd_hda_codec_generic hdaudioC1D2: mono: mono_out=0x0
     [ 24.851415] snd_hda_codec_generic hdaudioC1D2: dig-out=0x5/0x0
     [ 24.851747] snd_hda_codec_generic hdaudioC1D2: inputs:
     [ 25.056813] snd_hda_codec_generic hdaudioC1D3: autoconfig for
     Generic: line_outs=0 (0x0/0x0/0x0/0x0/0x0) type:line
     [ 25.057109] snd_hda_codec_generic hdaudioC1D3: speaker_outs=0
     (0x0/0x0/0x0/0x0/0x0)
     [ 25.057393] snd_hda_codec_generic hdaudioC1D3: hp_outs=0
     (0x0/0x0/0x0/0x0/0x0)
     [ 25.057658] snd_hda_codec_generic hdaudioC1D3: mono: mono_out=0x0
     [ 25.057924] snd_hda_codec_generic hdaudioC1D3: dig-out=0x5/0x0
     [ 25.058180] snd_hda_codec_generic hdaudioC1D3: inputs:
     [ 25.094153] input: HDA NVidia HDMI as
     /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input19
     [ 25.094539] input: HDA NVidia HDMI as
     /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input20
     [ 25.094891] input: HDA NVidia HDMI as
     /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input21
     [ 25.095249] input: HDA NVidia HDMI as
     /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input22
     [ 25.783253] cfg80211: Loading compiled-in X.509 certificates for
regulatory database
     --
     [ 26.044956] usb 2-1.4: [2] FU [PCM Playback Volume] ch = 4, val =
     -25600/0/64
     [ 26.046216] usbcore: registered new interface driver snd-usb-audio
     [ 26.088396] cfg80211: Problem loading in-kernel X.509 certificate
     (-
     13)
-----------------------
lsusb -v
Bus 002 Device 003: ID 06f8:b121 Guillemot Corp.
     Device Descriptor:
     bLength 18
     bDescriptorType 1
     bcdUSB 1.10
     bDeviceClass 0 (Defined at Interface level)
     bDeviceSubClass 0
     bDeviceProtocol 0
     bMaxPacketSize0 64
     idVendor 0x06f8 Guillemot Corp.
     idProduct 0xb121
     bcdDevice 2.00
     iManufacturer 1 Guillemot Corporation
     iProduct 2 Hercules P32 DJ
     iSerial 0
     bNumConfigurations 1
     Configuration Descriptor:
     bLength 9
     bDescriptorType 2
     wTotalLength 196
     bNumInterfaces 3
     bConfigurationValue 1
     iConfiguration 0
     bmAttributes 0xc0
     Self Powered
     MaxPower 480mA
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 0
     bAlternateSetting 0
     bNumEndpoints 0
     bInterfaceClass 1 Audio
     bInterfaceSubClass 1 Control Device
     bInterfaceProtocol 0
     iInterface 0
     AudioControl Interface Descriptor:
     bLength 10
     bDescriptorType 36
     bDescriptorSubtype 1 (HEADER)
     bcdADC 1.00
     wTotalLength 43
     bInCollection 2
     baInterfaceNr( 0) 1
     baInterfaceNr( 1) 2
     AudioControl Interface Descriptor:
     bLength 12
     bDescriptorType 36
     bDescriptorSubtype 2 (INPUT_TERMINAL)
     bTerminalID 1
     wTerminalType 0x0101 USB Streaming
     bAssocTerminal 0
     bNrChannels 4
     wChannelConfig 0x0033
     Left Front (L)
     Right Front (R)
     Left Surround (LS)
     Right Surround (RS)
     iChannelNames 0
     iTerminal 0
     AudioControl Interface Descriptor:
     bLength 12
     bDescriptorType 36
     bDescriptorSubtype 6 (FEATURE_UNIT)
     bUnitID 2
     bSourceID 1
     bControlSize 1
     bmaControls( 0) 0x00
     bmaControls( 1) 0x03
     Mute Control
     Volume Control
     bmaControls( 2) 0x03
     Mute Control
     Volume Control
     bmaControls( 3) 0x03
     Mute Control
     Volume Control
     bmaControls( 4) 0x03
     Mute Control
     Volume Control
     iFeature 0
     AudioControl Interface Descriptor:
     bLength 9
     bDescriptorType 36
     bDescriptorSubtype 3 (OUTPUT_TERMINAL)
     bTerminalID 3
     wTerminalType 0x0301 Speaker
     bAssocTerminal 0
     bSourceID 2
     iTerminal 0
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 1
     bAlternateSetting 0
     bNumEndpoints 0
     bInterfaceClass 1 Audio
     bInterfaceSubClass 2 Streaming
     bInterfaceProtocol 0
     iInterface 0
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 1
     bAlternateSetting 1
     bNumEndpoints 2
     bInterfaceClass 1 Audio
     bInterfaceSubClass 2 Streaming
     bInterfaceProtocol 0
     iInterface 0
     AudioStreaming Interface Descriptor:
     bLength 7
     bDescriptorType 36
     bDescriptorSubtype 1 (AS_GENERAL)
     bTerminalLink 1
     bDelay 1 frames
     wFormatTag 1 PCM
     AudioStreaming Interface Descriptor:
     bLength 11
     bDescriptorType 36
     bDescriptorSubtype 2 (FORMAT_TYPE)
     bFormatType 1 (FORMAT_TYPE_I)
     bNrChannels 4
     bSubframeSize 2
     bBitResolution 16
     bSamFreqType 1 Discrete
     tSamFreq[ 0] 48000
     Endpoint Descriptor:
     bLength 9
     bDescriptorType 5
     bEndpointAddress 0x01 EP 1 OUT
     bmAttributes 5
     Transfer Type Isochronous
     Synch Type Asynchronous
     Usage Type Data
     wMaxPacketSize 0x0188 1x 392 bytes
     bInterval 1
     bRefresh 0
     bSynchAddress 129
     AudioControl Endpoint Descriptor:
     bLength 7
     bDescriptorType 37
     bDescriptorSubtype 1 (EP_GENERAL)
     bmAttributes 0x00
     bLockDelayUnits 0 Undefined
     wLockDelay 0 Undefined
     Endpoint Descriptor:
     bLength 9
     bDescriptorType 5
     bEndpointAddress 0x81 EP 1 IN
     bmAttributes 17
     Transfer Type Isochronous
     Synch Type None
     Usage Type Feedback
     wMaxPacketSize 0x0003 1x 3 bytes
     bInterval 1
     bRefresh 5
     bSynchAddress 0
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 2
     bAlternateSetting 0
     bNumEndpoints 2
     bInterfaceClass 1 Audio
     bInterfaceSubClass 3 MIDI Streaming
     bInterfaceProtocol 0
     iInterface 2 Hercules P32 DJ
     MIDIStreaming Interface Descriptor:
     bLength 7
     bDescriptorType 36
     bDescriptorSubtype 1 (HEADER)
     bcdADC 1.00
     wTotalLength 65
     MIDIStreaming Interface Descriptor:
     bLength 6
     bDescriptorType 36
     bDescriptorSubtype 2 (MIDI_IN_JACK)
     bJackType 1 Embedded
     bJackID 1
     iJack 0
     MIDIStreaming Interface Descriptor:
     bLength 6
     bDescriptorType 36
     bDescriptorSubtype 2 (MIDI_IN_JACK)
     bJackType 2 External
     bJackID 2
     iJack 0
     MIDIStreaming Interface Descriptor:
     bLength 9
     bDescriptorType 36
     bDescriptorSubtype 3 (MIDI_OUT_JACK)
     bJackType 1 Embedded
     bJackID 3
     bNrInputPins 1
     baSourceID( 0) 2
     BaSourcePin( 0) 1
     iJack 0
     MIDIStreaming Interface Descriptor:
     bLength 9
     bDescriptorType 36
     bDescriptorSubtype 3 (MIDI_OUT_JACK)
     bJackType 2 External
     bJackID 4
     bNrInputPins 1
     baSourceID( 0) 1
     BaSourcePin( 0) 1
     iJack 0
     Endpoint Descriptor:
     bLength 9
     bDescriptorType 5
     bEndpointAddress 0x02 EP 2 OUT
     bmAttributes 2
     Transfer Type Bulk
     Synch Type None
     Usage Type Data
     wMaxPacketSize 0x0040 1x 64 bytes
     bInterval 0
     bRefresh 0
     bSynchAddress 0
     MIDIStreaming Endpoint Descriptor:
     bLength 5
     bDescriptorType 37
     bDescriptorSubtype 1 (GENERAL)
     bNumEmbMIDIJack 1
     baAssocJackID( 0) 1
     Endpoint Descriptor:
     bLength 9
     bDescriptorType 5
     bEndpointAddress 0x82 EP 2 IN
     bmAttributes 2
     Transfer Type Bulk
     Synch Type None
     Usage Type Data
     wMaxPacketSize 0x0040 1x 64 bytes
     bInterval 0
     bRefresh 0
     bSynchAddress 0
     MIDIStreaming Endpoint Descriptor:
     bLength 5
     bDescriptorType 37
     bDescriptorSubtype 1 (GENERAL)
     bNumEmbMIDIJack 1
     baAssocJackID( 0) 3
     Device Status: 0x0e01
     Self Powered
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate
     Matching
     Hub
     Device Descriptor:
     bLength 18
     bDescriptorType 1
     bcdUSB 2.00
     bDeviceClass 9 Hub
     bDeviceSubClass 0 Unused
     bDeviceProtocol 1 Single TT
     bMaxPacketSize0 64
     idVendor 0x8087 Intel Corp.
     idProduct 0x0020 Integrated Rate Matching Hub
     bcdDevice 0.00
     iManufacturer 0
     iProduct 0
     iSerial 0
     bNumConfigurations 1
     Configuration Descriptor:
     bLength 9
     bDescriptorType 2
     wTotalLength 25
     bNumInterfaces 1
     bConfigurationValue 1
     iConfiguration 0
     bmAttributes 0xe0
     Self Powered
     Remote Wakeup
     MaxPower 0mA
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 0
     bAlternateSetting 0
     bNumEndpoints 1
     bInterfaceClass 9 Hub
     bInterfaceSubClass 0 Unused
     bInterfaceProtocol 0 Full speed (or root) hub
     iInterface 0
     Endpoint Descriptor:
     bLength 7
     bDescriptorType 5
     bEndpointAddress 0x81 EP 1 IN
     bmAttributes 3
     Transfer Type Interrupt
     Synch Type None
     Usage Type Data
     wMaxPacketSize 0x0002 1x 2 bytes
     bInterval 12
     Hub Descriptor:
     bLength 11
     bDescriptorType 41
     nNbrPorts 8
     wHubCharacteristic 0x0089
     Per-port power switching
     Per-port overcurrent protection
     TT think time 8 FS bits
     Port indicators
     bPwrOn2PwrGood 50 * 2 milli seconds
     bHubContrCurrent 0 milli Ampere
     DeviceRemovable 0x00 0x00
     PortPwrCtrlMask 0xff 0xff
     Hub Port Status:
     Port 1: 0000.0100 power
     Port 2: 0000.0100 power
     Port 3: 0000.0100 power
     Port 4: 0000.0103 power enable connect
     Port 5: 0000.0100 power
     Port 6: 0000.0100 power
     Port 7: 0000.0100 power
     Port 8: 0000.0100 power
     Device Qualifier (for other device speed):
     bLength 10
     bDescriptorType 6
     bcdUSB 2.00
     bDeviceClass 9 Hub
     bDeviceSubClass 0 Unused
     bDeviceProtocol 0 Full speed (or root) hub
     bMaxPacketSize0 64
     bNumConfigurations 1
     Device Status: 0x0001
     Self Powered
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
     Device Descriptor:
     bLength 18
     bDescriptorType 1
     bcdUSB 2.00
     bDeviceClass 9 Hub
     bDeviceSubClass 0 Unused
     bDeviceProtocol 0 Full speed (or root) hub
     bMaxPacketSize0 64
     idVendor 0x1d6b Linux Foundation
     idProduct 0x0002 2.0 root hub
     bcdDevice 5.00
     iManufacturer 3 Linux 5.0.2 ehci_hcd
     iProduct 2 EHCI Host Controller
     iSerial 1 0000:00:1d.0
     bNumConfigurations 1
     Configuration Descriptor:
     bLength 9
     bDescriptorType 2
     wTotalLength 25
     bNumInterfaces 1
     bConfigurationValue 1
     iConfiguration 0
     bmAttributes 0xe0
     Self Powered
     Remote Wakeup
     MaxPower 0mA
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 0
     bAlternateSetting 0
     bNumEndpoints 1
     bInterfaceClass 9 Hub
     bInterfaceSubClass 0 Unused
     bInterfaceProtocol 0 Full speed (or root) hub
     iInterface 0
     Endpoint Descriptor:
     bLength 7
     bDescriptorType 5
     bEndpointAddress 0x81 EP 1 IN
     bmAttributes 3
     Transfer Type Interrupt
     Synch Type None
     Usage Type Data
     wMaxPacketSize 0x0004 1x 4 bytes
     bInterval 12
     Hub Descriptor:
     bLength 9
     bDescriptorType 41
     nNbrPorts 3
     wHubCharacteristic 0x000a
     No power switching (usb 1.0)
     Per-port overcurrent protection
     bPwrOn2PwrGood 10 * 2 milli seconds
     bHubContrCurrent 0 milli Ampere
     DeviceRemovable 0x00
     PortPwrCtrlMask 0xff
     Hub Port Status:
     Port 1: 0000.0503 highspeed power enable connect
     Port 2: 0000.0100 power
     Port 3: 0000.0100 power
     Device Status: 0x0001
     Self Powered
Bus 001 Device 005: ID 0d49:7010 Maxtor OneTouch
     Device Descriptor:
     bLength 18
     bDescriptorType 1
     bcdUSB 2.00
     bDeviceClass 0 (Defined at Interface level)
     bDeviceSubClass 0
     bDeviceProtocol 0
     bMaxPacketSize0 64
     idVendor 0x0d49 Maxtor
     idProduct 0x7010 OneTouch
     bcdDevice 2.00
     iManufacturer 1 Maxtor
     iProduct 3 OneTouch
     iSerial 2 Y61LWLCE
     bNumConfigurations 1
     Configuration Descriptor:
     bLength 9
     bDescriptorType 2
     wTotalLength 39
     bNumInterfaces 1
     bConfigurationValue 1
     iConfiguration 0
     bmAttributes 0xc0
     Self Powered
     MaxPower 0mA
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 0
     bAlternateSetting 0
     bNumEndpoints 3
     bInterfaceClass 8 Mass Storage
     bInterfaceSubClass 6 SCSI
     bInterfaceProtocol 80 Bulk-Only
     iInterface 0
     Endpoint Descriptor:
     bLength 7
     bDescriptorType 5
     bEndpointAddress 0x02 EP 2 OUT
     bmAttributes 2
     Transfer Type Bulk
     Synch Type None
     Usage Type Data
     wMaxPacketSize 0x0200 1x 512 bytes
     bInterval 0
     Endpoint Descriptor:
     bLength 7
     bDescriptorType 5
     bEndpointAddress 0x88 EP 8 IN
     bmAttributes 2
     Transfer Type Bulk
     Synch Type None
     Usage Type Data
     wMaxPacketSize 0x0200 1x 512 bytes
     bInterval 0
     Endpoint Descriptor:
     bLength 7
     bDescriptorType 5
     bEndpointAddress 0x81 EP 1 IN
     bmAttributes 3
     Transfer Type Interrupt
     Synch Type None
     Usage Type Data
     wMaxPacketSize 0x0002 1x 2 bytes
     bInterval 9
     Device Qualifier (for other device speed):
     bLength 10
     bDescriptorType 6
     bcdUSB 2.00
     bDeviceClass 0 (Defined at Interface level)
     bDeviceSubClass 0
     bDeviceProtocol 0
     bMaxPacketSize0 64
     bNumConfigurations 1
     Device Status: 0x0001
     Self Powered
Bus 001 Device 003: ID 064e:a219 Suyin Corp. 1.3M WebCam (notebook
     emachines E730, Acer sub-brand)
     Device Descriptor:
     bLength 18
     bDescriptorType 1
     bcdUSB 2.00
     bDeviceClass 239 Miscellaneous Device
     bDeviceSubClass 2 ?
     bDeviceProtocol 1 Interface Association
     bMaxPacketSize0 64
     idVendor 0x064e Suyin Corp.
     idProduct 0xa219 1.3M WebCam (notebook emachines E730, Acer
     sub-brand)
     bcdDevice 2.15
     iManufacturer 2 Suyin
     iProduct 1 1.3M WebCam
     iSerial 3 HF1315-S32B-OV01-VA-R02.01.05
     bNumConfigurations 1
     Configuration Descriptor:
     bLength 9
     bDescriptorType 2
     wTotalLength 527
     bNumInterfaces 2
     bConfigurationValue 1
     iConfiguration 0
     bmAttributes 0x80
     (Bus Powered)
     MaxPower 500mA
     Interface Association:
     bLength 8
     bDescriptorType 11
     bFirstInterface 0
     bInterfaceCount 2
     bFunctionClass 14 Video
     bFunctionSubClass 3 Video Interface Collection
     bFunctionProtocol 0
     iFunction 5 1.3M WebCam
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 0
     bAlternateSetting 0
     bNumEndpoints 1
     bInterfaceClass 14 Video
     bInterfaceSubClass 1 Video Control
     bInterfaceProtocol 0
     iInterface 5 1.3M WebCam
     VideoControl Interface Descriptor:
     bLength 13
     bDescriptorType 36
     bDescriptorSubtype 1 (HEADER)
     bcdUVC 1.00
     wTotalLength 77
     dwClockFrequency 15.000000MHz
     bInCollection 1
     baInterfaceNr( 0) 1
     VideoControl Interface Descriptor:
     bLength 9
     bDescriptorType 36
     bDescriptorSubtype 3 (OUTPUT_TERMINAL)
     bTerminalID 2
     wTerminalType 0x0101 USB Streaming
     bAssocTerminal 0
     bSourceID 4
     iTerminal 0
     VideoControl Interface Descriptor:
     bLength 26
     bDescriptorType 36
     bDescriptorSubtype 6 (EXTENSION_UNIT)
     bUnitID 4
     guidExtensionCode {7033f028-1163-2e4a-ba2c-
     6890eb334016}
     bNumControl 8
     bNrPins 1
     baSourceID( 0) 3
     bControlSize 1
     bmControls( 0) 0x0f
     iExtension 0
     VideoControl Interface Descriptor:
     bLength 18
     bDescriptorType 36
     bDescriptorSubtype 2 (INPUT_TERMINAL)
     bTerminalID 1
     wTerminalType 0x0201 Camera Sensor
     bAssocTerminal 0
     iTerminal 0
     wObjectiveFocalLengthMin 0
     wObjectiveFocalLengthMax 0
     wOcularFocalLength 0
     bControlSize 3
     bmControls 0x00000000
     VideoControl Interface Descriptor:
     bLength 11
     bDescriptorType 36
     bDescriptorSubtype 5 (PROCESSING_UNIT)
     Warning: Descriptor too short
     bUnitID 3
     bSourceID 1
     wMaxMultiplier 0
     bControlSize 2
     bmControls 0x0000153f
     Brightness
     Contrast
     Hue
     Saturation
     Sharpness
     Gamma
     Backlight Compensation
     Power Line Frequency
     White Balance Temperature, Auto
     iProcessing 0
     bmVideoStandards 0xc6
     NTSC - 525/60
     PAL - 625/50
     Endpoint Descriptor:
     bLength 7
     bDescriptorType 5
     bEndpointAddress 0x83 EP 3 IN
     bmAttributes 3
     Transfer Type Interrupt
     Synch Type None
     Usage Type Data
     wMaxPacketSize 0x0010 1x 16 bytes
     bInterval 6
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 1
     bAlternateSetting 0
     bNumEndpoints 0
     bInterfaceClass 14 Video
     bInterfaceSubClass 2 Video Streaming
     bInterfaceProtocol 0
     iInterface 5 1.3M WebCam
     VideoStreaming Interface Descriptor:
     bLength 14
     bDescriptorType 36
     bDescriptorSubtype 1 (INPUT_HEADER)
     bNumFormats 1
     wTotalLength 307
     bEndPointAddress 129
     bmInfo 0
     bTerminalLink 2
     bStillCaptureMethod 2
     bTriggerSupport 0
     bTriggerUsage 0
     bControlSize 1
     bmaControls( 0) 27
     VideoStreaming Interface Descriptor:
     bLength 27
     bDescriptorType 36
     bDescriptorSubtype 4 (FORMAT_UNCOMPRESSED)
     bFormatIndex 1
     bNumFrameDescriptors 7
     guidFormat {59555932-0000-1000-8000-
     00aa00389b71}
     bBitsPerPixel 16
     bDefaultFrameIndex 1
     bAspectRatioX 0
     bAspectRatioY 0
     bmInterlaceFlags 0x00
     Interlaced stream or variable: No
     Fields per frame: 2 fields
     Field 1 first: No
     Field pattern: Field 1 only
     bCopyProtect 0
     VideoStreaming Interface Descriptor:
     bLength 34
     bDescriptorType 36
     bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
     bFrameIndex 1
     bmCapabilities 0x00
     Still image unsupported
     wWidth 640
     wHeight 480
     dwMinBitRate 73728000
     dwMaxBitRate 147456000
     dwMaxVideoFrameBufferSize 614400
     dwDefaultFrameInterval 333333
     bFrameIntervalType 2
     dwFrameInterval( 0) 333333
     dwFrameInterval( 1) 666666
     VideoStreaming Interface Descriptor:
     bLength 34
     bDescriptorType 36
     bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
     bFrameIndex 2
     bmCapabilities 0x00
     Still image unsupported
     wWidth 352
     wHeight 288
     dwMinBitRate 24330240
     dwMaxBitRate 48660480
     dwMaxVideoFrameBufferSize 202752
     dwDefaultFrameInterval 333333
     bFrameIntervalType 2
     dwFrameInterval( 0) 333333
     dwFrameInterval( 1) 666666
     VideoStreaming Interface Descriptor:
     bLength 34
     bDescriptorType 36
     bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
     bFrameIndex 3
     bmCapabilities 0x00
     Still image unsupported
     wWidth 320
     wHeight 240
     dwMinBitRate 18432000
     dwMaxBitRate 36864000
     dwMaxVideoFrameBufferSize 153600
     dwDefaultFrameInterval 333333
     bFrameIntervalType 2
     dwFrameInterval( 0) 333333
     dwFrameInterval( 1) 666666
     VideoStreaming Interface Descriptor:
     bLength 34
     bDescriptorType 36
     bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
     bFrameIndex 4
     bmCapabilities 0x00
     Still image unsupported
     wWidth 176
     wHeight 144
     dwMinBitRate 6082560
     dwMaxBitRate 12165120
     dwMaxVideoFrameBufferSize 50688
     dwDefaultFrameInterval 333333
     bFrameIntervalType 2
     dwFrameInterval( 0) 333333
     dwFrameInterval( 1) 666666
     VideoStreaming Interface Descriptor:
     bLength 34
     bDescriptorType 36
     bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
     bFrameIndex 5
     bmCapabilities 0x00
     Still image unsupported
     wWidth 160
     wHeight 120
     dwMinBitRate 4608000
     dwMaxBitRate 9216000
     dwMaxVideoFrameBufferSize 38400
     dwDefaultFrameInterval 333333
     bFrameIntervalType 2
     dwFrameInterval( 0) 333333
     dwFrameInterval( 1) 666666
     VideoStreaming Interface Descriptor:
     bLength 30
     bDescriptorType 36
     bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
     bFrameIndex 6
     bmCapabilities 0x00
     Still image unsupported
     wWidth 1280
     wHeight 800
     dwMinBitRate 122880000
     dwMaxBitRate 122880000
     dwMaxVideoFrameBufferSize 2048000
     dwDefaultFrameInterval 1333333
     bFrameIntervalType 1
     dwFrameInterval( 0) 1333333
     VideoStreaming Interface Descriptor:
     bLength 30
     bDescriptorType 36
     bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
     bFrameIndex 7
     bmCapabilities 0x00
     Still image unsupported
     wWidth 1280
     wHeight 1024
     dwMinBitRate 157286400
     dwMaxBitRate 157286400
     dwMaxVideoFrameBufferSize 2621440
     dwDefaultFrameInterval 1333333
     bFrameIntervalType 1
     dwFrameInterval( 0) 1333333
     VideoStreaming Interface Descriptor:
     bLength 30
     bDescriptorType 36
     bDescriptorSubtype 3 (STILL_IMAGE_FRAME)
     bEndpointAddress 0
     bNumImageSizePatterns 6
     wWidth( 0) 1280
     wHeight( 0) 1024
     wWidth( 1) 640
     wHeight( 1) 480
     wWidth( 2) 320
     wHeight( 2) 240
     wWidth( 3) 320
     wHeight( 3) 240
     wWidth( 4) 176
     wHeight( 4) 144
     wWidth( 5) 160
     wHeight( 5) 120
     bNumCompressionPatterns 6
     VideoStreaming Interface Descriptor:
     bLength 6
     bDescriptorType 36
     bDescriptorSubtype 13 (COLORFORMAT)
     bColorPrimaries 1 (BT.709,sRGB)
     bTransferCharacteristics 1 (BT.709)
     bMatrixCoefficients 4 (SMPTE 170M (BT.601))
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 1
     bAlternateSetting 1
     bNumEndpoints 1
     bInterfaceClass 14 Video
     bInterfaceSubClass 2 Video Streaming
     bInterfaceProtocol 0
     iInterface 0
     Endpoint Descriptor:
     bLength 7
     bDescriptorType 5
     bEndpointAddress 0x81 EP 1 IN
     bmAttributes 5
     Transfer Type Isochronous
     Synch Type Asynchronous
     Usage Type Data
     wMaxPacketSize 0x0080 1x 128 bytes
     bInterval 1
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 1
     bAlternateSetting 2
     bNumEndpoints 1
     bInterfaceClass 14 Video
     bInterfaceSubClass 2 Video Streaming
     bInterfaceProtocol 0
     iInterface 0
     Endpoint Descriptor:
     bLength 7
     bDescriptorType 5
     bEndpointAddress 0x81 EP 1 IN
     bmAttributes 5
     Transfer Type Isochronous
     Synch Type Asynchronous
     Usage Type Data
     wMaxPacketSize 0x0100 1x 256 bytes
     bInterval 1
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 1
     bAlternateSetting 3
     bNumEndpoints 1
     bInterfaceClass 14 Video
     bInterfaceSubClass 2 Video Streaming
     bInterfaceProtocol 0
     iInterface 0
     Endpoint Descriptor:
     bLength 7
     bDescriptorType 5
     bEndpointAddress 0x81 EP 1 IN
     bmAttributes 5
     Transfer Type Isochronous
     Synch Type Asynchronous
     Usage Type Data
     wMaxPacketSize 0x0320 1x 800 bytes
     bInterval 1
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 1
     bAlternateSetting 4
     bNumEndpoints 1
     bInterfaceClass 14 Video
     bInterfaceSubClass 2 Video Streaming
     bInterfaceProtocol 0
     iInterface 0
     Endpoint Descriptor:
     bLength 7
     bDescriptorType 5
     bEndpointAddress 0x81 EP 1 IN
     bmAttributes 5
     Transfer Type Isochronous
     Synch Type Asynchronous
     Usage Type Data
     wMaxPacketSize 0x0b20 2x 800 bytes
     bInterval 1
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 1
     bAlternateSetting 5
     bNumEndpoints 1
     bInterfaceClass 14 Video
     bInterfaceSubClass 2 Video Streaming
     bInterfaceProtocol 0
     iInterface 0
     Endpoint Descriptor:
     bLength 7
     bDescriptorType 5
     bEndpointAddress 0x81 EP 1 IN
     bmAttributes 5
     Transfer Type Isochronous
     Synch Type Asynchronous
     Usage Type Data
     wMaxPacketSize 0x1320 3x 800 bytes
     bInterval 1
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 1
     bAlternateSetting 6
     bNumEndpoints 1
     bInterfaceClass 14 Video
     bInterfaceSubClass 2 Video Streaming
     bInterfaceProtocol 0
     iInterface 0
     Endpoint Descriptor:
     bLength 7
     bDescriptorType 5
     bEndpointAddress 0x81 EP 1 IN
     bmAttributes 5
     Transfer Type Isochronous
     Synch Type Asynchronous
     Usage Type Data
     wMaxPacketSize 0x1400 3x 1024 bytes
     bInterval 1
     Device Qualifier (for other device speed):
     bLength 10
     bDescriptorType 6
     bcdUSB 2.00
     bDeviceClass 239 Miscellaneous Device
     bDeviceSubClass 2 ?
     bDeviceProtocol 1 Interface Association
     bMaxPacketSize0 64
     bNumConfigurations 1
     Device Status: 0x0002
     (Bus Powered)
     Remote Wakeup Enabled
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate
     Matching
     Hub
     Device Descriptor:
     bLength 18
     bDescriptorType 1
     bcdUSB 2.00
     bDeviceClass 9 Hub
     bDeviceSubClass 0 Unused
     bDeviceProtocol 1 Single TT
     bMaxPacketSize0 64
     idVendor 0x8087 Intel Corp.
     idProduct 0x0020 Integrated Rate Matching Hub
     bcdDevice 0.00
     iManufacturer 0
     iProduct 0
     iSerial 0
     bNumConfigurations 1
     Configuration Descriptor:
     bLength 9
     bDescriptorType 2
     wTotalLength 25
     bNumInterfaces 1
     bConfigurationValue 1
     iConfiguration 0
     bmAttributes 0xe0
     Self Powered
     Remote Wakeup
     MaxPower 0mA
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 0
     bAlternateSetting 0
     bNumEndpoints 1
     bInterfaceClass 9 Hub
     bInterfaceSubClass 0 Unused
     bInterfaceProtocol 0 Full speed (or root) hub
     iInterface 0
     Endpoint Descriptor:
     bLength 7
     bDescriptorType 5
     bEndpointAddress 0x81 EP 1 IN
     bmAttributes 3
     Transfer Type Interrupt
     Synch Type None
     Usage Type Data
     wMaxPacketSize 0x0001 1x 1 bytes
     bInterval 12
     Hub Descriptor:
     bLength 9
     bDescriptorType 41
     nNbrPorts 6
     wHubCharacteristic 0x0089
     Per-port power switching
     Per-port overcurrent protection
     TT think time 8 FS bits
     Port indicators
     bPwrOn2PwrGood 50 * 2 milli seconds
     bHubContrCurrent 0 milli Ampere
     DeviceRemovable 0x00
     PortPwrCtrlMask 0xff
     Hub Port Status:
     Port 1: 0000.0503 highspeed power enable connect
     Port 2: 0000.0503 highspeed power enable connect
     Port 3: 0000.0100 power
     Port 4: 0000.0100 power
     Port 5: 0000.0100 power
     Port 6: 0000.0100 power
     Device Qualifier (for other device speed):
     bLength 10
     bDescriptorType 6
     bcdUSB 2.00
     bDeviceClass 9 Hub
     bDeviceSubClass 0 Unused
     bDeviceProtocol 0 Full speed (or root) hub
     bMaxPacketSize0 64
     bNumConfigurations 1
     Device Status: 0x0001
     Self Powered
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
     Device Descriptor:
     bLength 18
     bDescriptorType 1
     bcdUSB 2.00
     bDeviceClass 9 Hub
     bDeviceSubClass 0 Unused
     bDeviceProtocol 0 Full speed (or root) hub
     bMaxPacketSize0 64
     idVendor 0x1d6b Linux Foundation
     idProduct 0x0002 2.0 root hub
     bcdDevice 5.00
     iManufacturer 3 Linux 5.0.2 ehci_hcd
     iProduct 2 EHCI Host Controller
     iSerial 1 0000:00:1a.0
     bNumConfigurations 1
     Configuration Descriptor:
     bLength 9
     bDescriptorType 2
     wTotalLength 25
     bNumInterfaces 1
     bConfigurationValue 1
     iConfiguration 0
     bmAttributes 0xe0
     Self Powered
     Remote Wakeup
     MaxPower 0mA
     Interface Descriptor:
     bLength 9
     bDescriptorType 4
     bInterfaceNumber 0
     bAlternateSetting 0
     bNumEndpoints 1
     bInterfaceClass 9 Hub
     bInterfaceSubClass 0 Unused
     bInterfaceProtocol 0 Full speed (or root) hub
     iInterface 0
     Endpoint Descriptor:
     bLength 7
     bDescriptorType 5
     bEndpointAddress 0x81 EP 1 IN
     bmAttributes 3
     Transfer Type Interrupt
     Synch Type None
     Usage Type Data
     wMaxPacketSize 0x0004 1x 4 bytes
     bInterval 12
     Hub Descriptor:
     bLength 9
     bDescriptorType 41
     nNbrPorts 3
     wHubCharacteristic 0x000a
     No power switching (usb 1.0)
     Per-port overcurrent protection
     bPwrOn2PwrGood 10 * 2 milli seconds
     bHubContrCurrent 0 milli Ampere
     DeviceRemovable 0x00
     PortPwrCtrlMask 0xff
     Hub Port Status:
     Port 1: 0000.0503 highspeed power enable connect
     Port 2: 0000.0100 power
     Port 3: 0000.0100 power
     Device Status: 0x0001
     Self Powered
Does anybody know how to fix this problem ?
Regards,
Guido
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     Alsa-devel@alsa-project.org
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References
1. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/soun...
   2. https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git/tree/sound/u...
   3. https://mailman.alsa-project.org/mailman/listinfo/alsa-devel