Re: [alsa-devel] Altec Lansing FX5051 USB Speakers

15 Dec 2007


      Any suggestions at all? I love this system's sound in windows, and I 
really don't want to have to try to sell it to a non-linux user.
On Mon, Nov 12, 2007 at 09:49:12PM -0700, Jeremy Nickurak wrote:
...
Some number of months ago I posted a request here for any suggestions in 
getting a set of USB speakers from Altec Lansing, model# FX5051, working 
with ALSA. I wasn't able to follow up in detail at the time, so I'm 
hoping try again.
They're a set of 5.1 speakers with a built in USB sound card. Sound does 
appear to work, but the mixer is locked at 100%. There is no analog 
manual mixer, and the digital control dial exhibits the same problem as 
alsamixer, so I have to find a way to adjust the usb device's mixer 
volume in order to make the speakers usable.
The speakers work fine in Windows XP, without installing any drivers, so 
it would seem that this device is operating based on some standard.
In windows, adjusting the mixer via the digital control dial, or via the 
windows mixer control both result in the LED display moving in sync to 
indicate the new volume setting.
In alsa, adjusting the digital control dial doesn't appear to have any 
effect, other then waking the LED display from its low-light mode. 
Attempting to adjust volume from alsamixer likewise wakes the display 
from low-light mode, but also fails to significantly change the mixer 
setting.  When I say significantly, I mean that the mixer flips between 
about 98% and 100%, when using the Up/Down keys (or PgUp or PgDown). End 
appears to drop the volume to 0%, but Home doesn't restore it.
Pressing the device's 'Power' button also behaves strangely. I can turn 
the device off, but it is turned back on shortly afterward. No usb 
connect/disconnect events appear here, instead, the power button seems 
to function more like a mute.
amixer -c 2 contents yields:
atrus@kedri:~$ amixer -c 2 contents
numid=3,iface=MIXER,name='Tone Control - Bass'
  ; type=INTEGER,access=rw------,values=1,min=0,max=10,step=0
  : values=1
numid=4,iface=MIXER,name='Tone Control - Treble'
  ; type=INTEGER,access=rw------,values=1,min=0,max=10,step=0
  : values=3
numid=1,iface=MIXER,name='PCM Playback Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=2,iface=MIXER,name='PCM Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=49,step=0
  : values=48,48
  | dBscale-min=-49.00dB,step=1.00dB,mute=0
I'm attaching the contents of 'lsusb -v'.
Any suggestions would be appreciated, and any requests for further 
information about this device will be accomodated ASAP.
Thanks in advance.
--
Jeremy Nickurak -= Email/Jabber: atrus@rifetech.com =-
...
Bus 004 Device 002: ID 04d2:5051 Altec Lansing Technologies 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        16
  idVendor           0x04d2 Altec Lansing Technologies
  idProduct          0x5051 
  bcdDevice            1.12
  iManufacturer           1 Altec Lansing Technologies, Inc.
  iProduct                2 Altec Lansing - FX5051
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          139
    bNumInterfaces          3
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x40
      (Missing must-be-set bit!)
      Self Powered
    MaxPower                0mA
    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                 9
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdADC               1.00
        wTotalLength           44
        bInCollection           1
        baInterfaceNr( 0)       1
      AudioControl Interface Descriptor:
        bLength                12
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bNrChannels             6
        wChannelConfig     0x003f
          Left Front (L)
          Right Front (R)
          Center Front (C)
          Low Freqency Enhancement (LFE)
          Left Surround (LS)
          Right Surround (RS)
        iChannelNames           0 
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                14
        bDescriptorType        36
        bDescriptorSubtype      6 (FEATURE_UNIT)
        bUnitID                 2
        bSourceID               1
        bControlSize            1
        bmaControls( 0)      0x15
          Mute
          Bass
          Treble
        bmaControls( 1)      0x02
          Volume
        bmaControls( 2)      0x02
          Volume
        bmaControls( 3)      0x00
        bmaControls( 4)      0x00
        bmaControls( 5)      0x00
        bmaControls( 6)      0x00
        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           1
      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             6
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            1 Discrete
        tSamFreq[ 0]        48000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            9
          Transfer Type            Isochronous
          Synch Type               Adaptive
          Usage Type               Data
        wMaxPacketSize     0x0240  1x 576 bytes
        bInterval               1
        bRefresh                0
        bSynchAddress           0
        AudioControl Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x01
            Sampling Frequency
          bLockDelayUnits         0 Undefined
          wLockDelay              0 Undefined
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Devices
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None
      iInterface              0 
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.00
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength     172
          Report Descriptor: (length is 172)
            Item(Global): Usage Page, data= [ 0x0c ] 12
                            Consumer
            Item(Local ): Usage, data= [ 0x01 ] 1
                            Consumer Control
            Item(Main  ): Collection, data= [ 0x01 ] 1
                            Application
            Item(Global): Usage Page, data= [ 0x0c ] 12
                            Consumer
            Item(Local ): Usage, data= [ 0xe2 ] 226
                            Mute
            Item(Local ): Usage, data= [ 0xe9 ] 233
                            Volume Increment
            Item(Local ): Usage, data= [ 0xea ] 234
                            Volume Decrement
            Item(Local ): Usage, data= [ 0x52 0x01 ] 338
                            Bass Increment
            Item(Local ): Usage, data= [ 0x53 0x01 ] 339
                            Bass Decrement
            Item(Local ): Usage, data= [ 0x54 0x01 ] 340
                            Treble Increment
            Item(Local ): Usage, data= [ 0x55 0x01 ] 341
                            Treble Decrement
            Item(Local ): Usage, data= [ 0x00 ] 0
                            Unassigned
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0x01 ] 1
            Item(Global): Report Size, data= [ 0x01 ] 1
            Item(Global): Report Count, data= [ 0x08 ] 8
            Item(Main  ): Input, data= [ 0x82 ] 130
                            Data Variable Absolute No_Wrap Linear
                            Preferred_State No_Null_Position Volatile Bitfield
            Item(Global): Usage Page, data= [ 0x00 0xff ] 65280
                            (null)
            Item(Local ): Usage, data= [ 0x01 ] 1
                            (null)
            Item(Local ): Usage, data= [ 0x3a ] 58
                            (null)
            Item(Local ): Usage, data= [ 0x2e ] 46
                            (null)
            Item(Local ): Usage, data= [ 0x09 ] 9
                            (null)
            Item(Local ): Usage, data= [ 0x0a ] 10
                            (null)
            Item(Local ): Usage, data= [ 0x3d ] 61
                            (null)
            Item(Local ): Usage, data= [ 0x3e ] 62
                            (null)
            Item(Local ): Usage, data= [ 0xff ] 255
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0x01 ] 1
            Item(Global): Report Size, data= [ 0x01 ] 1
            Item(Global): Report Count, data= [ 0x08 ] 8
            Item(Main  ): Input, data= [ 0x82 ] 130
                            Data Variable Absolute No_Wrap Linear
                            Preferred_State No_Null_Position Volatile Bitfield
            Item(Global): Usage Page, data= [ 0x0c ] 12
                            Consumer
            Item(Local ): Usage, data= [ 0xe2 ] 226
                            Mute
            Item(Local ): Usage, data= [ 0xe9 ] 233
                            Volume Increment
            Item(Local ): Usage, data= [ 0xea ] 234
                            Volume Decrement
            Item(Local ): Usage, data= [ 0x52 0x01 ] 338
                            Bass Increment
            Item(Local ): Usage, data= [ 0x53 0x01 ] 339
                            Bass Decrement
            Item(Local ): Usage, data= [ 0x54 0x01 ] 340
                            Treble Increment
            Item(Local ): Usage, data= [ 0x55 0x01 ] 341
                            Treble Decrement
            Item(Local ): Usage, data= [ 0x00 ] 0
                            Unassigned
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0x01 ] 1
            Item(Global): Report Size, data= [ 0x01 ] 1
            Item(Global): Report Count, data= [ 0x08 ] 8
            Item(Main  ): Output, data= [ 0x82 ] 130
                            Data Variable Absolute No_Wrap Linear
                            Preferred_State No_Null_Position Volatile Bitfield
            Item(Global): Usage Page, data= [ 0x00 0xff ] 65280
                            (null)
            Item(Local ): Usage, data= [ 0x01 ] 1
                            (null)
            Item(Local ): Usage, data= [ 0x3a ] 58
                            (null)
            Item(Local ): Usage, data= [ 0x09 ] 9
                            (null)
            Item(Local ): Usage, data= [ 0x0a ] 10
                            (null)
            Item(Local ): Usage, data= [ 0x3d ] 61
                            (null)
            Item(Local ): Usage, data= [ 0x3e ] 62
                            (null)
            Item(Local ): Usage, data= [ 0xfe ] 254
                            (null)
            Item(Local ): Usage, data= [ 0x00 ] 0
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0x01 ] 1
            Item(Global): Report Size, data= [ 0x01 ] 1
            Item(Global): Report Count, data= [ 0x08 ] 8
            Item(Main  ): Output, data= [ 0x82 ] 130
                            Data Variable Absolute No_Wrap Linear
                            Preferred_State No_Null_Position Volatile Bitfield
            Item(Local ): Usage, data= [ 0xf0 ] 240
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0xff ] 65535
            Item(Global): Report Size, data= [ 0x10 ] 16
            Item(Global): Report Count, data= [ 0x01 ] 1
            Item(Main  ): Output, data= [ 0x82 ] 130
                            Data Variable Absolute No_Wrap Linear
                            Preferred_State No_Null_Position Volatile Bitfield
            Item(Local ): Usage, data= [ 0xf1 ] 241
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0xff 0xff 0xff ] -1
            Item(Global): Report Size, data= [ 0x20 ] 32
            Item(Global): Report Count, data= [ 0x01 ] 1
            Item(Main  ): Output, data= [ 0x82 ] 130
                            Data Variable Absolute No_Wrap Linear
                            Preferred_State No_Null_Position Volatile Bitfield
            Item(Local ): Usage, data= [ 0xf2 ] 242
                            (null)
            Item(Global): Logical Minimum, data= [ 0x00 ] 0
            Item(Global): Logical Maximum, data= [ 0xff 0xff 0xff 0xff ] -1
            Item(Global): Report Size, data= [ 0x20 ] 32
            Item(Global): Report Count, data= [ 0x01 ] 1
            Item(Main  ): Output, data= [ 0x82 ] 130
                            Data Variable Absolute No_Wrap Linear
                            Preferred_State No_Null_Position Volatile Bitfield
            Item(Main  ): End Collection, data=none
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0002  1x 2 bytes
        bInterval               1
Device Status:     0x0001
  Self Powered
Bus 004 Device 001: ID 0000:0000  
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            9 Hub
  bDeviceSubClass         0 Unused
  bDeviceProtocol         0 Full speed hub
  bMaxPacketSize0        64
  idVendor           0x0000 
  idProduct          0x0000 
  bcdDevice            2.06
  iManufacturer           3 Linux 2.6.22-14-generic uhci_hcd
  iProduct                2 UHCI Host Controller
  iSerial                 1 0000:00:1d.3
  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 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             255
Hub Descriptor:
  bLength               9
  bDescriptorType      41
  nNbrPorts             2
  wHubCharacteristic 0x000a
    No power switching (usb 1.0)
    Per-port overcurrent protection
  bPwrOn2PwrGood        1 * 2 milli seconds
  bHubContrCurrent      0 milli Ampere
  DeviceRemovable    0x00
  PortPwrCtrlMask    0xff
 Hub Port Status:
   Port 1: 0000.0103 power enable connect
   Port 2: 0000.0100 power
Device Status:     0x0003
  Self Powered
  Remote Wakeup Enabled
...

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-- 
Jeremy Nickurak -= Email/Jabber: atrus@rifetech.com =-