What needs to be done to unexpire this? I have exactly the same problem.
Like the OP I have confirmed that aplay plays fine to the iec958 device
but pulseaudio seems to alias it's iec958 oputput to analog. I also
have a colleague with the same card so this bug affects at least 3 of
us. My card is the Xonar U7 Echelon Edition which I believe is exactly
the same card as the OP, just different packaging and curiously a
different alsa-name: Xonar U7 Echelon Ed.
I don't really understand alsa/pulseaudio config etc but happy to
product/hack config files etc. to test any ideas.
Since aplay to hw:3,1 worked for me I wondered if Raymond's comment
about iec958 needing to be first device was the problem and simply
tried editing my USB-Audio.conf to be :
# If a device does not use the first PCM device for digital data, the device
# number for the iec958 device can be changed here.
USB-Audio.pcm.iec958_device {
# "NoiseBlaster 3000" 42
"Xonar U7 Echelon Ed." 1
This made no difference (but then I did say I don't understand
alsa/pulseaudio so was probably stupid)
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https://bugs.launchpad.net/bugs/1498129
Title:
Asus Xonar U7 S/PDIF output not recognized by pulseaudio
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