Raymond - thank you for all your help. I now have my Xonar U7 Echelon
Ed. working with SPDIF. Clemend from the alsa-dev team suggested the
following:
"""
Try changing /usr/share/alsa/cards/USB-Audio.conf. Dont add an entry to
the USB-Audio.pcm.iec958_device list near the top, but go to the bottom,
to the USB-Audio.pcm.iec958.0 definition, and change this:
USB-Audio.pcm.iec958.0 {
@args [ CARD AES0 AES1 AES2 AES3 ]
@args.CARD { type string }
@args.AES0 { type integer }
@args.AES1 { type integer }
@args.AES2 { type integer }
@args.AES3 { type integer }
@func refer
name {
...(lots of stuff)...
}
default {
...(lots of stuff)...
}
}
to this:
USB-Audio.pcm.iec958.0 {
@args [ CARD AES0 AES1 AES2 AES3 ]
@args.CARD { type string }
@args.AES0 { type integer }
@args.AES1 { type integer }
@args.AES2 { type integer }
@args.AES3 { type integer }
type hw # no @func
card $CARD
device 1
}
"""
I believe this fix ignores card-identification and assigns ALL USB
soundcards so that iec958 is on device 1 rather than device 0. It is a
hack because I cannot use other USB for iec958 cards but currently that
is not a requirement so I am happy.
When I made the fix alsa picked it up without needing a restart i.e. I when I
run
aplay -L | grep -A 2 iec958
I get
iec958:CARD=Ed,DEV=0
Xonar U7 Echelon Ed., USB Audio #1
IEC958 (S/PDIF) Digital Audio Output
Pulseaudio needed restarting to pick up the change and then everything
worked well.
I will make a better fix when my Linux version supports the alsa release
which has support or special characters.
Thank you again or helping me resolve this.
=======================================================================================
aoandr - I have a friend who has an original Asus Xonar U7 (which
identifies itself to Alsa as "Xonur U7"). I have helped him get this
working with iec958.
This worked for him:
aplay -l [ to identify the card]
amixer -c[x] sset 'IEC958 In' on [to ensure it is unmuted in alsa - [x]
is the card number from aplay -l]
add the
USB-Audio.pcm.iec958_device {
"Xonar U7" 1
...
}
to USB-Audio.conf
restart Pulseaudio and alsa (a reboot is easier than killing everything)
All worked after this for his Xonar U7
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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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