alsa-project/alsa-lib issue #123 was opened from x1unix:

Hello, I have a [Fiio M3K](https://fiio.com/m3k) player which I often use as an external USB DAC.

It worked well with Pipewire, but I had some other issues with Pipewire so I had to rollback to PulseAudio. Unfortunately, PulseAudio and module-alsa-card cannot setup this device, so it doesn't work.

Here is a small portion of PulseAudio log (full log is available at link below):

``` E: [pulseaudio] module-alsa-card.c: Failed to find a working profile. E: [pulseaudio] module.c: Failed to load module "module-alsa-card" (argument: "device_id="2" name="usb-GuangZhou_FiiO_Electronics_Technology_Co.__Ltd._FiiO_M3K_FiiO_M3K-00" card_name="alsa_card.usb-GuangZhou_FiiO_Electronics_Technology_Co.__Ltd._FiiO_M3K_FiiO_M3K-00" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes use_ucm=yes avoid_resampling=no card_properties="module-udev-detect.discovered=1""): initialization failed. I: [pulseaudio] module-udev-detect.c: Card /devices/pci0000:00/0000:00:08.1/0000:0b:00.3/usb5/5-1/5-1:1.0/sound/card2 (alsa_card.usb-GuangZhou_FiiO_Electronics_Technology_Co.__Ltd._FiiO_M3K_FiiO_M3K-00) failed to load module. D: [pulseaudio] module-udev-detect.c: /dev/snd/controlC2 is accessible: yes D: [pulseaudio] module-udev-detect.c: /devices/pci0000:00/0000:00:08.1/0000:0b:00.3/usb5/5-1/5-1:1.0/sound/card2 is busy: no ```

I'm using ArchLinux and Linux 5.11.2.

**Logs and debug info**

aplay, pulseaudio debug log and other info I've posted as gist: https://gist.github.com/x1unix/dae3fb810ac499cc63362a805220968f

Issue URL : https://github.com/alsa-project/alsa-lib/issues/123 Repository URL: https://github.com/alsa-project/alsa-lib