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Re: Help with USB audio card




David Christensen <dpchrist@xxxxxxxxxxxxxxxx> writes:

> On 08/07/17 05:15, Rodolfo Medina wrote:
>> Hi all.
>>
>> I just bought an external USB audio card.  I plugged it into the USB port of
>> my PC and plugged a 3.5mm jack microphone into the `mic' input of the card.
>> It is shown in lsusb:
>>
>> $ lsusb
>> Bus 002 Device 005: ID 17ef:602e Lenovo
>> Bus 002 Device 003: ID 046d:c312 Logitech, Inc. DeLuxe 250 Keyboard
>> Bus 002 Device 002: ID 0438:7900 Advanced Micro Devices, Inc.
>> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>> Bus 001 Device 010: ID 0d8c:013c C-Media Electronics, Inc. CM108 Audio Controlle
>> Bus 001 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader
>> Bus 001 Device 002: ID 0438:7900 Advanced Micro Devices, Inc.
>> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>> Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
>> Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>>
>>
>> and also in arecord:
>>
>> $ arecord --list-devices
>> **** List of CAPTURE Hardware Devices ****
>> card 1: Generic [HD-Audio Generic], device 0: ALC662 rev3 Analog [ALC662 rev3 Analog]
>>   Subdevices: 0/1
>>   Subdevice #0: subdevice #0
>> card 1: Generic [HD-Audio Generic], device 2: ALC662 rev3 Alt Analog [ALC662 rev3 Alt Analog]
>>   Subdevices: 1/1
>>   Subdevice #0: subdevice #0
>> card 2: Device [USB PnP Sound Device], device 0: USB Audio [USB Audio]
>>   Subdevices: 1/1
>>   Subdevice #0: subdevice #0
>>
>> Besides, I ran alsamixer, selected the USB card and unmuted everything.  But
>> then, when I try to record, no sound is recorded.  I do:
>>
>>  $ sox -t alsa hw:2,0 output.wav
>>
>> , or
>>
>>  $ arecord -f S16_LE -D hw:2,0 -r 96000 test.wav
>>
>> , or also within Audacity.  But nothing, my voice is not recorded.  Please
>> help whoever can.
>
> STFW I found some information that might be useful.
>
>
> Here is the chip makers web site:
>
> https://www.cmedia.com.tw/EN/index.html
>
>
> It looks like two versions of the chip are currently made:
>
> https://www.cmedia.com.tw/products/USB20_FULL_SPEED/CM108AH
>
> https://www.cmedia.com.tw/products/USB20_FULL_SPEED/CM108B
>
>
> This link indicates that some version of the chip worked on some Linux machines
> at some point in time:
>
> https://linux-hardware.org/index.php?id=usb:0d8c-013c
>
>
> More links:
>
> http://www.linux-usb.org/USB-guide/x319.html
>
> https://linux-hardware.org/index.php?id=usb:0d8c-013c
>
>
> There are several links for people with Raspberry Pi boards running Raspian.
> They made changes to their ALSA configuration to use a CM108 USB audio
> interface.  I don't know if those instructions apply to Debian.
>
>
> Please run the following commands, and cut and past the commands and their
> outputs into a reply:
>
> cat /etc/debian_version
>
> uname -a
>
> dmesg | grep -i cm108 -A 10 -B 10


Thanks...

$ cat /etc/debian_version
buster/sid

$ uname -a
Linux lenovo 4.9.0-3-amd64 #1 SMP Debian 4.9.30-2 (2017-06-12) x86_64 GNU/Linux

`dmesg | grep -i cm108 -A 10 -B 10' produced no output at all...



Cheers,
Rodolfo