soundcheck wrote: 
> I use Linux standard "hw:x,0" or "plughw:x,0".  Not sure why squeezelite
> is not showing the most simplest outputs.
> The x gets replaced by the card index which is shown with "aplay -l" or
> "cat /proc/asound/cards"
> If the card has more then one output channel eg. analog/digital you
> might need to change the 0 to 1 or similar.
> 

I would recommend use of hw: as the alsa device, and to target it to a
specific card rather than be subject to devices getting renumbered
(which is likely with usb device if you hotplug them), then use
hw:CARD=XXXXX, where XXXX is the card name.

The listing from squeezelite is the same as aplay -L and uses the
standard alsa api to get the card names - it may be worth processing
this to make it hw:CARD=XXXX entries, but I have not done that at
present - so you see exactly what aplay would show which is what alsa
returns for pcm devices. [see alsa snd_device_name_hint api]


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