alsa-project/alsa-lib issue #98 was edited from vchuravy:
Hello! i hope this is the right venue for reporting not working audio devices.
```
alsa-capabilities
9: `USB Audio' Digital USB Audio Class audio output on device Shure MV7 -hardware address: hw:3,0 (or hw:MV7,0) -device label: Shure MV7 -formats: (n/a) -usb audio class: UAC2 (isochronous asynchronous) -streamfile: /proc/asound/card3/stream0 -character device: /dev/snd/pcmC3D0p -monitor file: /proc/asound/card3/pcm0p/sub0/hw_params ```
`alsa-info.sh`: http://alsa-project.org/db/?f=7bfa1d9ac09aac53a52834e95b833d299dfe3896 `pulseaudio -vvv` https://gist.github.com/vchuravy/f5f8ee972d5e2179387c8c53423379f6
During the pulseaudio session I plugged the device in and then unplugged it. I am happy to dig in, but I would need some guidance on where to start. As a side-note the microphone seems to work on Android so I am wondering if they are using a different driver.
The device has a head-phone jack with feedback from the mic, and without pulseaudio running I hear the microphone inputs. So I was wondering if this was in particular a pulseaudio issue.
```
arecord -l
**** List of CAPTURE Hardware Devices **** card 1: Generic [HD-Audio Generic], device 0: ALCS1200A Analog [ALCS1200A Analog] Subdevices: 0/1 Subdevice #0: subdevice #0 card 1: Generic [HD-Audio Generic], device 2: ALCS1200A Alt Analog [ALCS1200A Alt Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 2: C925e [Logitech Webcam C925e], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 card 3: MV7 [Shure MV7], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0
arecord -d 3 -f U8 sample.mp3
ALSA lib pcm_dsnoop.c:638:(snd_pcm_dsnoop_open) unable to open slave arecord: main:830: audio open error: No such file or directory ```
Issue URL : https://github.com/alsa-project/alsa-lib/issues/98 Repository URL: https://github.com/alsa-project/alsa-lib