[alsa-devel] MCP7A HDMI passthrough audio Linux/ALSA

Stephane BERTHELOT sberthelot at emisfr.com
Tue Jun 30 22:51:03 CEST 2009


Takashi Iwai a écrit :
> At Tue, 30 Jun 2009 15:04:05 +0200,
> Stéphane BERTHELOT wrote:
>   
>> Hi Takashi,
>>
>> Thanks for you answer.
>> I have the exact same problem and configuration than reported here 
>> https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4406
>> apart :
>> - I'm using a ION platform (Acer Revo R3600 but still MCP7A : 0x10de0007)
>> - I never get the Dolby Digital or DTS indicator illuminated on my Amp.
>> - My TV is a Sharp LC-52X20E
>>
>> I thought this was a known problem and than someone at Nvidia could 
>> provide the missing HDA Verbs, if you prefer I can post to the 
>> alsa-devel mailing list to investigate further.
>> I can get a alsa-info output tonight, though it's very very similar to 
>> the one in the bug report. (and Raymond was saying that we should get 
>> "PCM AC3" on digital outputs)
>>     
>
> Try ac3dec for a primary testing instead of mplayer.  It's included in
> alsa-tools.
>
> 	% ac3dec -C -H foo.ac3
>
> Use the latest one so that it accespt -H option.
>
>
> Takashi
>
>
>   
Thank you Takashi for taking time to review my problem. I cc'ed 
alsa-devel since I have more info now and maybe some other people have 
the same problem or already a workaround.

I'm attaching the output of alsa-info.sh with my mixer settings and 
after having run ac3dec -H -C file.ac3

It works with -R instead of -C but does not work with -C or with -P 
(consumer or pro)
I also tried modifying settings using iecset (audio off / audio on and 
consumer/pro) and no combination seems to work.

When I play stereo LPCM my TV set plays sound and so does my Amp in PCM 
mode.
When I try to play in AC3 mode (-C) my TV set says "incompatible format 
received" and both the TV and Amp stay silent.

I may try again on XP/Vista tomorrow to be really sure it works on them.

When changing play mode AES0 changes from 0x00 to 0x02 and AES1 to AES3 
stay the same (0x82,0x00,0x02 if I remember well)

Is there any other test you want me to do, I'll have time tomorrow 
evening (CEST).

Thanks a lot,
Stephane.

(http://www.alsa-project.org/db/?f=cf3bc4202b4fcbf93ba68db55e492d51a3e46177)

!!################################
!!ALSA Information Script v 0.4.56
!!################################

!!Script ran on: Tue Jun 30 20:22:23 UTC 2009


!!Linux Distribution
!!------------------

Slackware 13.0.0.0.0


!!Kernel Information
!!------------------

Kernel release:    2.6.29.5
Operating System:  GNU/Linux
Architecture:      x86_64
Processor:         Intel(R) Atom(TM) CPU  230   @ 1.60GHz
SMP Enabled:       Yes


!!ALSA Version
!!------------

Driver version:     1.0.20
Library version:    1.0.18
Utilities version:  1.0.18


!!Loaded ALSA modules
!!-------------------

snd_hda_intel


!!Sound Servers on this system
!!----------------------------

ESound Daemon:
      Installed - Yes (/usr/bin/esd)
      Running - No


!!Soundcards recognised by ALSA
!!-----------------------------

 0 [NVidia         ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xfae78000 irq 22


!!PCI Soundcards installed in the system
!!--------------------------------------

00:08.0 Audio device: nVidia Corporation MCP79 High Definition Audio (rev b1)


!!Advanced information - PCI Vendor/Device/Susbsystem ID's
!!--------------------------------------------------------

00:08.0 0403: 10de:0ac0 (rev b1)
	Subsystem: 1025:0222


!!Loaded sound module options
!!--------------------------

!!Module: snd_hda_intel
bdl_pos_adj : 32,-1,-1,-1,-1,-1,-1,-1
enable : Y,Y,Y,Y,Y,Y,Y,Y
enable_msi : 0
id : <NULL>,<NULL>,<NULL>,<NULL>,<NULL>,<NULL>,<NULL>,<NULL>
index : -1,-1,-1,-1,-1,-1,-1,-1
model : <NULL>,<NULL>,<NULL>,<NULL>,<NULL>,<NULL>,<NULL>,<NULL>
position_fix : 0,0,0,0,0,0,0,0
power_save : 0
power_save_controller : Y
probe_mask : -1,-1,-1,-1,-1,-1,-1,-1
probe_only : N,N,N,N,N,N,N,N
single_cmd : N


!!HDA-Intel Codec information
!!---------------------------
--startcollapse--

Codec: Realtek ALC662 rev1
Address: 0
Function Id: 0x1
Vendor Id: 0x10ec0662
Subsystem Id: 0x10250222
Revision Id: 0x100101
No Modem Function Group found
Default PCM:
    rates [0x160]: 44100 48000 96000
    bits [0xe]: 16 20 24
    formats [0x1]: PCM
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
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
  Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
  Amp-Out vals:  [0x00 0x00]
  Converter: stream=0, channel=0
  PCM:
    rates [0x160]: 44100 48000 96000
    bits [0xe]: 16 20 24
    formats [0x1]: PCM
Node 0x03 [Audio Output] wcaps 0x1d: Stereo Amp-Out
  Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
  Amp-Out vals:  [0x00 0x00]
  Converter: stream=0, channel=0
  PCM:
    rates [0x160]: 44100 48000 96000
    bits [0xe]: 16 20 24
    formats [0x1]: PCM
Node 0x04 [Audio Output] wcaps 0x1d: Stereo Amp-Out
  Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
  Amp-Out vals:  [0x00 0x00]
  Converter: stream=0, channel=0
  PCM:
    rates [0x160]: 44100 48000 96000
    bits [0xe]: 16 20 24
    formats [0x1]: PCM
Node 0x05 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x06 [Audio Output] wcaps 0x211: Stereo Digital
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  PCM:
    rates [0x160]: 44100 48000 96000
    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=0x09, nsteps=0x1f, stepsize=0x05, mute=1
  Amp-In vals:  [0x89 0x89]
  Converter: stream=0, channel=0
  SDI-Select: 0
  PCM:
    rates [0x160]: 44100 48000 96000
    bits [0x6]: 16 20
    formats [0x1]: PCM
  Connection: 1
     0x23
Node 0x09 [Audio Input] wcaps 0x10011b: Stereo Amp-In
  Amp-In caps: ofs=0x09, nsteps=0x1f, stepsize=0x05, mute=1
  Amp-In vals:  [0x00 0x00]
  Converter: stream=0, channel=0
  SDI-Select: 0
  PCM:
    rates [0x160]: 44100 48000 96000
    bits [0x6]: 16 20
    formats [0x1]: PCM
  Connection: 1
     0x22
Node 0x0a [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x0b [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
  Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
  Amp-In vals:  [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80]
  Connection: 9
     0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16
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] [0x00 0x00]
  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] [0x00 0x00]
  Connection: 2
     0x03 0x0b
Node 0x0e [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x00 0x00] [0x00 0x00]
  Connection: 2
     0x04 0x0b
Node 0x0f [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x10 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x11 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x12 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x13 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x14 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x00 0x00]
  Pincap 0x0001003c: IN OUT HP EAPD Detect
  EAPD 0x0:
  Pin Default 0x01214010: [Jack] HP Out at Ext Rear
    Conn = 1/8, Color = Green
    DefAssociation = 0x1, Sequence = 0x0
  Pin-ctls: 0xc0: OUT HP
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x0c
Node 0x15 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x00 0x00]
  Pincap 0x00010034: IN OUT EAPD Detect
  EAPD 0x0:
  Pin Default 0x99130120: [Fixed] Speaker at Int ATAPI
    Conn = ATAPI, Color = Unknown
    DefAssociation = 0x2, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x0d
Node 0x16 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
  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: 1
     0x0e
Node 0x17 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x18 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, 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 0x01a19830: [Jack] Mic at Ext Rear
    Conn = 1/8, Color = Pink
    DefAssociation = 0x3, Sequence = 0x0
  Pin-ctls: 0x24: IN VREF_80
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x0e
Node 0x19 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
  Amp-In vals:  [0x00 0x00]
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x80 0x80]
  Pincap 0x0000173c: IN OUT HP 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
  Connection: 2
     0x0c* 0x0e
Node 0x1a [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
  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: 1
     0x0d
Node 0x1b [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
  Amp-In vals:  [0x00 0x00]
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x80 0x80]
  Pincap 0x0000173c: IN OUT HP 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
  Connection: 2
     0x0c* 0x0e
Node 0x1c [Pin Complex] wcaps 0x400001: Stereo
  Pincap 0x00000020: IN
  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
Node 0x1d [Pin Complex] wcaps 0x400000: Mono
  Pincap 0x00000020: IN
  Pin Default 0x40020601: [N/A] Line Out at Ext N/A
    Conn = 1/4, Color = Unknown
    DefAssociation = 0x0, Sequence = 0x1
  Pin-ctls: 0x20: IN
Node 0x1e [Pin Complex] wcaps 0x400300: Mono Digital
  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: 0x40: OUT
  Connection: 1
     0x06
Node 0x1f [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x20 [Vendor Defined Widget] wcaps 0xf00040: Mono
  Processing caps: benign=0, ncoeff=12
  Processing Coefficient: 0x00
  Coefficient Index: 0x06
Node 0x21 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x22 [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] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
  Connection: 10
     0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x0b
Node 0x23 [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] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
  Connection: 10
     0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x0b
Node 0x24 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x25 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x26 [Vendor Defined Widget] wcaps 0xf00000: Mono
Codec: Nvidia MCP7A HDMI
Address: 3
Function Id: 0x1
Vendor Id: 0x10de0007
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
GPIO: io=0, o=0, i=0, unsolicited=0, wake=0
Node 0x04 [Audio Output] wcaps 0x211: Stereo Digital
  Converter: stream=0, channel=0
  Digital: Enabled Non-Audio Pro
  Digital category: 0x0
  PCM:
    rates [0xc0]: 48000 88200
    bits [0xf]: 8 16 20 24
    formats [0x1]: PCM
Node 0x05 [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000014: OUT Detect
  Pin Default 0x18560110: [Jack] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0x1, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x04
Node 0x06 [Audio Output] wcaps 0x211: Stereo Digital
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  PCM:
    rates [0xc0]: 48000 88200
    bits [0xf]: 8 16 20 24
    formats [0x1]: PCM
Node 0x07 [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000014: OUT Detect
  Pin Default 0x58560121: [N/A] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0x2, Sequence = 0x1
    Misc = NO_PRESENCE
  Pin-ctls: 0x00:
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x06
Node 0x08 [Audio Output] wcaps 0x211: Stereo Digital
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  PCM:
    rates [0xc0]: 48000 88200
    bits [0xf]: 8 16 20 24
    formats [0x1]: PCM
Node 0x09 [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000014: OUT Detect
  Pin Default 0x58560122: [N/A] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0x2, Sequence = 0x2
    Misc = NO_PRESENCE
  Pin-ctls: 0x00:
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x08
Node 0x0a [Audio Output] wcaps 0x211: Stereo Digital
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  PCM:
    rates [0xc0]: 48000 88200
    bits [0xf]: 8 16 20 24
    formats [0x1]: PCM
Node 0x0b [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000014: OUT Detect
  Pin Default 0x58560123: [N/A] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0x2, Sequence = 0x3
    Misc = NO_PRESENCE
  Pin-ctls: 0x00:
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x0a
Node 0x0c [Audio Output] wcaps 0x211: Stereo Digital
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  PCM:
    rates [0xc0]: 48000 88200
    bits [0xf]: 8 16 20 24
    formats [0x1]: PCM
Node 0x0d [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000014: OUT Detect
  Pin Default 0x58560124: [N/A] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0x2, Sequence = 0x4
    Misc = NO_PRESENCE
  Pin-ctls: 0x00:
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x0c
--endcollapse--


!!ALSA Device nodes
!!-----------------

crw-rw---- 1 root audio 116,  0 Jul  1  2009 /dev/snd/controlC0
crw-rw---- 1 root audio 116,  4 Jul  1  2009 /dev/snd/hwC0D0
crw-rw---- 1 root audio 116,  7 Jul  1  2009 /dev/snd/hwC0D3
crw-rw---- 1 root audio 116, 24 Jul  1  2009 /dev/snd/pcmC0D0c
crw-rw---- 1 root audio 116, 16 Jun 30 22:11 /dev/snd/pcmC0D0p
crw-rw---- 1 root audio 116, 19 Jun 30 22:21 /dev/snd/pcmC0D3p
crw-rw---- 1 root audio 116,  1 Jun 30 22:10 /dev/snd/seq
crw-rw---- 1 root audio 116, 33 Jul  1  2009 /dev/snd/timer


!!ALSA configuration files
!!------------------------

!!System wide config file (/etc/asound.conf)

#pcm.!default {
#	     type plug
#	     slave.pcm "hdmi"
#}

pcm.hdmiconv { type plug slave { pcm "hw:0,3" rate 48000 } }


pcm.headset {
	type bluetooth
}

ctl.headset {
	type bluetooth
}


!!Aplay/Arecord output
!!------------

APLAY

**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 0: ALC662 Analog [ALC662 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 3: NVIDIA HDMI [NVIDIA HDMI]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

ARECORD

**** List of CAPTURE Hardware Devices ****
card 0: NVidia [HDA NVidia], device 0: ALC662 Analog [ALC662 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

!!Amixer output
!!-------------

!!-------Mixer controls for card 0 [NVidia]

Card hw:0 'NVidia'/'HDA NVidia at 0xfae78000 irq 22'
  Mixer name	: 'Nvidia MCP7A HDMI'
  Components	: 'HDA:10ec0662,10250222,00100101 HDA:10de0007,10de0101,00100100'
  Controls      : 18
  Simple ctrls  : 9
Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 64
  Mono: Playback 52 [81%] [-12.00dB] [on]
Simple mixer control 'Headphone',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 64
  Mono:
  Front Left: Playback 0 [0%] [-64.00dB] [on]
  Front Right: Playback 0 [0%] [-64.00dB] [on]
Simple mixer control 'PCM',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 255
  Mono:
  Front Left: Playback 213 [84%] [-8.40dB]
  Front Right: Playback 213 [84%] [-8.40dB]
Simple mixer control 'Front',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 64
  Mono:
  Front Left: Playback 52 [81%] [-12.00dB] [on]
  Front Right: Playback 52 [81%] [-12.00dB] [on]
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%]
  Front Right: 0 [0%]
Simple mixer control 'IEC958',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'Capture',0
  Capabilities: cvolume cswitch
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 31
  Front Left: Capture 0 [0%] [-13.50dB] [on]
  Front Right: Capture 0 [0%] [-13.50dB] [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] [on]
  Front Right: Playback 0 [0%] [-34.50dB] [on]


!!Alsactl output
!!-------------

--startcollapse--
state.NVidia {
	control.1 {
		comment.access 'read write'
		comment.type INTEGER
		comment.count 2
		comment.range '0 - 64'
		comment.dbmin -6400
		comment.dbmax 0
		iface MIXER
		name 'Front Playback Volume'
		value.0 52
		value.1 52
	}
	control.2 {
		comment.access 'read write'
		comment.type BOOLEAN
		comment.count 2
		iface MIXER
		name 'Front Playback Switch'
		value.0 true
		value.1 true
	}
	control.3 {
		comment.access 'read write'
		comment.type INTEGER
		comment.count 2
		comment.range '0 - 64'
		comment.dbmin -6400
		comment.dbmax 0
		iface MIXER
		name 'Headphone Playback Volume'
		value.0 0
		value.1 0
	}
	control.4 {
		comment.access 'read write'
		comment.type BOOLEAN
		comment.count 2
		iface MIXER
		name 'Headphone Playback Switch'
		value.0 true
		value.1 true
	}
	control.5 {
		comment.access 'read write'
		comment.type INTEGER
		comment.count 2
		comment.range '0 - 31'
		comment.dbmin -3450
		comment.dbmax 1200
		iface MIXER
		name 'Mic Playback Volume'
		value.0 0
		value.1 0
	}
	control.6 {
		comment.access 'read write'
		comment.type BOOLEAN
		comment.count 2
		iface MIXER
		name 'Mic Playback Switch'
		value.0 false
		value.1 false
	}
	control.7 {
		comment.access 'read write'
		comment.type INTEGER
		comment.count 2
		comment.range '0 - 3'
		comment.dbmin 0
		comment.dbmax 3000
		iface MIXER
		name 'Mic Boost'
		value.0 0
		value.1 0
	}
	control.8 {
		comment.access 'read write'
		comment.type BOOLEAN
		comment.count 2
		iface MIXER
		name 'Capture Switch'
		value.0 true
		value.1 true
	}
	control.9 {
		comment.access 'read write'
		comment.type INTEGER
		comment.count 2
		comment.range '0 - 31'
		comment.dbmin -1350
		comment.dbmax 3300
		iface MIXER
		name 'Capture Volume'
		value.0 0
		value.1 0
	}
	control.10 {
		comment.access 'read write'
		comment.type INTEGER
		comment.count 2
		comment.range '0 - 31'
		comment.dbmin -3450
		comment.dbmax 1200
		iface MIXER
		name 'Beep Playback Volume'
		value.0 0
		value.1 0
	}
	control.11 {
		comment.access 'read write'
		comment.type BOOLEAN
		comment.count 2
		iface MIXER
		name 'Beep Playback Switch'
		value.0 true
		value.1 true
	}
	control.12 {
		comment.access 'read write'
		comment.type INTEGER
		comment.count 1
		comment.range '0 - 64'
		comment.dbmin -6400
		comment.dbmax 0
		iface MIXER
		name 'Master Playback Volume'
		value 52
	}
	control.13 {
		comment.access 'read write'
		comment.type BOOLEAN
		comment.count 1
		iface MIXER
		name 'Master Playback Switch'
		value true
	}
	control.14 {
		comment.access read
		comment.type IEC958
		comment.count 1
		iface MIXER
		name 'IEC958 Playback Con Mask'
		value '0fff000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
	}
	control.15 {
		comment.access read
		comment.type IEC958
		comment.count 1
		iface MIXER
		name 'IEC958 Playback Pro Mask'
		value '0f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
	}
	control.16 {
		comment.access 'read write'
		comment.type IEC958
		comment.count 1
		iface MIXER
		name 'IEC958 Playback Default'
		value '0782000200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
	}
	control.17 {
		comment.access 'read write'
		comment.type BOOLEAN
		comment.count 1
		iface MIXER
		name 'IEC958 Playback Switch'
		value true
	}
	control.18 {
		comment.access 'read write user'
		comment.type INTEGER
		comment.count 2
		comment.range '0 - 255'
		comment.tlv '0000000100000008ffffec1400000014'
		comment.dbmin -5100
		comment.dbmax 0
		iface MIXER
		name 'PCM Playback Volume'
		value.0 213
		value.1 213
	}
}
--endcollapse--


!!All Loaded Modules
!!------------------

Module
snd_seq_dummy
snd_seq_oss
snd_seq_midi_event
snd_seq
snd_seq_device
snd_pcm_oss
snd_mixer_oss
ipv6
ppdev
lp
parport_pc
parport
fuse
snd_hda_codec_nvhdmi
nvidia
snd_hda_codec_realtek
ath5k
mac80211
rfkill
led_class
snd_hda_intel
cfg80211
snd_hda_codec
psmouse
serio_raw
shpchp
snd_hwdep
snd_pcm
snd_timer
sg
snd
soundcore
forcedeth
snd_page_alloc
rtc_cmos
rtc_core
thermal
wmi
rtc_lib
processor
button
thermal_sys
hwmon
evdev




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