On Wed, 13 Apr 2016, Scott Doty wrote:
So I'm having the worst luck with optical SPDIF devices. ...
3 [HD ]: USB-Audio - USB Sound Blaster HD Creative Technology USB Sound Blaster HD at usb-0000:00:14.0-4.7.6, full speed
I used to be able to use the optical SPDIF input for this device from my synth, but that seems to have stopped working. Further, I can't play audio out of the Sound Blaster HD's optical SPDIF output, either. It works in Windows 10, which is where I had to spend my latest music session -- yuck.
Exactly what does 'stopped working' mean? Doesn't it should up when you enumerate audio devices, does it show up but input and output results in silence, does it show up but attempting to send audio results in an error, etc. (I know you linked to a long ALSA dump, but folks around here would be more willing to help if you stated as precisely as you could which symptoms you actually have.)
/Ricard