USB sound card not usable in ALSA

Started by peboer, June 20, 2015, 12:47:00 AM

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peboer

June 20, 2015, 12:47:00 AM
I have an A13 board (rev F) using the Debian boot from SD card (purchased).
I've tried a couple USB sound cards that work fine on my Rpi B+ running a modified Ubuntu. If I try
aplay -l
I get
**** List of PLAYBACK Hardware Devices ****
card 0: sunxicodec [sunxi-CODEC], device 0: M1 PCM [sunxi PCM]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
with which I can output audio from the A13's built-in audio jacks. If I list my USB devices:
lsusb
I see my card recognized in the output:
Bus 002 Device 003: ID 0a92:0031 EGO SYStems, Inc. GIGAPortAG
This is a USB-Audio device and should not require any special drivers beyond USB Audio. A verbose listing indicates that it is enumerated as an audio device. But I cannot find any good reference on how to get ALSA to recognize it so I can use it! Any thoughts?

Here is the verbose listing from lsusb, for what it is worth:


Bus 002 Device 006: ID 0a92:0031 EGO SYStems, Inc. GIGAPortAG
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         8
  idVendor           0x0a92 EGO SYStems, Inc.
  idProduct          0x0031 GIGAPortAG
  bcdDevice            1.00
  iManufacturer           1 Ego Systems Inc.
  iProduct                2 GIGAPort AG
  iSerial                 0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          122
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              250mA
    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           46
        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             8
        wChannelConfig     0x00ff
          Left Front (L)
          Right Front (R)
          Center Front (C)
          Low Freqency Enhancement (LFE)
          Left Surround (LS)
          Right Surround (RS)
          Left of Center (LC)
          Right of Center (RC)
        iChannelNames           0
        iTerminal               0
      AudioControl Interface Descriptor:
        bLength                16
        bDescriptorType        36
        bDescriptorSubtype      6 (FEATURE_UNIT)
        bUnitID                 2
        bSourceID               1
        bControlSize            1
        bmaControls( 0)      0x03
          Mute Control
          Volume Control
        bmaControls( 1)      0x00
        bmaControls( 2)      0x00
        bmaControls( 3)      0x00
        bmaControls( 4)      0x00
        bmaControls( 5)      0x00
        bmaControls( 6)      0x00
        bmaControls( 7)      0x00
        bmaControls( 8)      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                17
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             8
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            3 Discrete
        tSamFreq[ 0]        32000
        tSamFreq[ 1]        44100
        tSamFreq[ 2]        48000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            9
          Transfer Type            Isochronous
          Synch Type               Adaptive
          Usage Type               Data
        wMaxPacketSize     0x0300  1x 768 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
Device Status:     0x0000
  (Bus Powered)

Gerrit

#1
June 20, 2015, 05:51:02 PM
you have to add the module in the kernel, "snd_usb_audio" module works for most usb audio cards

peboer

#2
June 29, 2015, 11:03:28 PM
I've been searching for a guide on how to do this, and I'm not entirely clear on what I need to download and install to add this module - or will I need to recompile the kernel? I'm kind of a dilletante when it comes to this level of *nix hacking!

Gerrit

#3
June 29, 2015, 11:57:15 PM Last Edit: June 29, 2015, 11:59:18 PM by Gerrit
recompile the kernel.

https://olimex.wordpress.com/2014/01/15/building-debian-linux-bootable-sd-card-with-hardware-accelerated-video-decoding-and-kernel-3-4-for-a13-olinuxino/

"1. Setup of the toolchain" then skip to "3.Building kernel sources for A13-OLinuXino"

when you get to
Code Select
# make ARCH=arm menuconfig select
Device Drivers ---> Sound card support ---> Advanced Linux Sound Architecture ---> USB sound devices -->

select "< > USB Audio/MIDI driver" and press the spacebar to get "<M> USB Audio/MIDI driver"
exit back back and safe the configuration.

then finish with
Code Select
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j4 uImage
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j4 INSTALL_MOD_PATH=out modules
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j4 INSTALL_MOD_PATH=out modules_install

then "6. Write kernel uImage you build to the SD-card"
then "8. Debian rootfs" but just the part where they describe where to copy the kernel modules.


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