Hi all,
    I use an application (on another platform) that accesses the CM108 C-Media device via “plughw 1:0” and I’m trying to do the same thing on a RPi. The C-Media device appears to be recognized but it is not appearing as a plughw (or hw for that matter) in the output of arecord -L.
    I’ve googled a fair bit without success so was wondering if anyone could give me a prod in the right direction. Here is the output of a few commands:

    Code: Select all

    1. pi@aprx ~ $ lsusb
    2. Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp. 
    3. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    4. Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. 
    5. Bus 001 Device 004: ID 0d8c:013c C-Media Electronics, Inc. CM108 Audio Controller
    6. Bus 001 Device 005: ID 1a40:0101 Terminus Technology Inc. 4-Port HUB
    7. Bus 001 Device 006: ID 1a40:0101 Terminus Technology Inc. 4-Port HUB
    8. pi@aprx ~ $ 
    9. pi@aprx ~ $ arecord -l
    10. **** List of CAPTURE Hardware Devices ****
    11. card 0: Device [USB PnP Sound Device], device 0: USB Audio [USB Audio]
    12.   Subdevices: 1/1
    13.   Subdevice #0: subdevice #0
    14. pi@aprx ~ $
    15. pi@aprx ~ $ arecord -L
    16. null
    17.     Discard all samples (playback) or generate zero samples (capture)
    18. default:CARD=Device
    19.     USB PnP Sound Device, USB Audio
    20.     Default Audio Device
    21. sysdefault:CARD=Device
    22.     USB PnP Sound Device, USB Audio
    23.     Default Audio Device
    24. front:CARD=Device,DEV=0
    25.     USB PnP Sound Device, USB Audio
    26.     Front speakers
    27. surround40:CARD=Device,DEV=0
    28.     USB PnP Sound Device, USB Audio
    29.     4.0 Surround output to Front and Rear speakers
    30. surround41:CARD=Device,DEV=0
    31.     USB PnP Sound Device, USB Audio
    32.     4.1 Surround output to Front, Rear and Subwoofer speakers
    33. surround50:CARD=Device,DEV=0
    34.     USB PnP Sound Device, USB Audio
    35.     5.0 Surround output to Front, Center and Rear speakers
    36. surround51:CARD=Device,DEV=0
    37.     USB PnP Sound Device, USB Audio
    38.     5.1 Surround output to Front, Center, Rear and Subwoofer speakers
    39. surround71:CARD=Device,DEV=0
    40.     USB PnP Sound Device, USB Audio
    41.     7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
    42. iec958:CARD=Device,DEV=0
    43.     USB PnP Sound Device, USB Audio
    44.     IEC958 (S/PDIF) Digital Audio Output

    This appears at the bottom of the same command on my other platform:

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    1. hw:CARD=Device,DEV=0
    2.     Generic USB Audio Device, USB Audio
    3.     Direct hardware device without any conversions
    4. plughw:CARD=Device,DEV=0
    5.     Generic USB Audio Device, USB Audio
    6.     Hardware device with all software conversions

    Advice appreciated.

    Ian