Hello, I buy a cheap USB audio device: https://es.aliexpress.com/item/4000038850174.html
This is the device info: $ lsusb | grep Audio Bus 004 Device 003: ID 08bb:2902 Texas Instruments PCM2902 Audio Codec # dmesg [ 1923.797116] usb usb4-port2: disabled by hub (EMI?), re-enabling... [ 1923.797141] usb 4-2: USB disconnect, device number 2 [ 1924.140040] usb 4-2: new full-speed USB device number 3 using ohci-pci [ 1924.339006] usb 4-2: New USB device found, idVendor=08bb, idProduct=2902, bcdDevice= 1.00 [ 1924.339017] usb 4-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 1924.339021] usb 4-2: Product: USB PnP Sound Device [ 1924.339025] usb 4-2: Manufacturer: C-Media Electronics Inc. [ 1924.510998] input: C-Media Electronics Inc. USB PnP Sound Device as /devices/pci0000:00/0000:00:12.0/usb4/4-2/4-2:1.3/0003:08BB:2902.0002/input/input4 [ 1924.568551] hid-generic 0003:08BB:2902.0002: input,hidraw0: USB HID v1.00 Device [C-Media Electronics Inc. USB PnP Sound Device] on usb-0000:00:12.0-2/input3 The problem is that my Spotify docker container can not open the device: ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4660:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4660:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4660:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5148:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2642:(snd_pcm_open_noupdate) Unknown PCM default [2022-02-18T09:40:36Z ERROR librespot_playback::audio_backend::alsa] Alsa error PCM open ALSA function 'snd_pcm_open' failed with error 'ENOENT: No such file or directory' [2022-02-18T09:40:36Z ERROR librespot_playback::player] Could not start audio: Alsa error: PCM open failed If I execute "alsamixer" it doesn't found the device: $ alsamixer cannot open mixer: No existe el fichero o el directorio I need to configure with device parameter: $ alsamixer -c 1 This is the output: https://ibb.co/tcJPc89 This is the aplay info: $ aplay -l **** List of PLAYBACK Hardware Devices **** card 1: Device [USB PnP Sound Device], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 $ aplay -L null Discard all samples (playback) or generate zero samples (capture) hw:CARD=Device,DEV=0 USB PnP Sound Device, USB Audio Direct hardware device without any conversions plughw:CARD=Device,DEV=0 USB PnP Sound Device, USB Audio Hardware device with all software conversions default:CARD=Device USB PnP Sound Device, USB Audio Default Audio Device sysdefault:CARD=Device USB PnP Sound Device, USB Audio Default Audio Device front:CARD=Device,DEV=0 USB PnP Sound Device, USB Audio Front output / input surround21:CARD=Device,DEV=0 USB PnP Sound Device, USB Audio 2.1 Surround output to Front and Subwoofer speakers surround40:CARD=Device,DEV=0 USB PnP Sound Device, USB Audio 4.0 Surround output to Front and Rear speakers surround41:CARD=Device,DEV=0 USB PnP Sound Device, USB Audio 4.1 Surround output to Front, Rear and Subwoofer speakers surround50:CARD=Device,DEV=0 USB PnP Sound Device, USB Audio 5.0 Surround output to Front, Center and Rear speakers surround51:CARD=Device,DEV=0 USB PnP Sound Device, USB Audio 5.1 Surround output to Front, Center, Rear and Subwoofer speakers surround71:CARD=Device,DEV=0 USB PnP Sound Device, USB Audio 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers iec958:CARD=Device,DEV=0 USB PnP Sound Device, USB Audio IEC958 (S/PDIF) Digital Audio Output dmix:CARD=Device,DEV=0 USB PnP Sound Device, USB Audio Direct sample mixing device I am using it in a Debian 11.2 server with alsa-tools and alsa-utils packages. I am missing some configuration? Could you help please? Best regards. -- Josu Lazkano
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