http://git.alsa-project.org/?p=alsa-lib.git;a=blob;f=src/conf/cards/USB- Audio.conf;hb=HEAD
for usb audio device 0 is default device for iec958 lsusb -vvvv pulseaudio does not support multi channel volume control Simple mixer control 'Speaker',0 Capabilities: pvolume pswitch pswitch-joined Playback channels: Front Left - Front Right - Rear Left - Rear Right - Front Center - Woofer - Side Left - Side Right Limits: Playback 0 - 127 Mono: Front Left: Playback 107 [84%] [-20.00dB] [on] Front Right: Playback 107 [84%] [-20.00dB] [on] Rear Left: Playback 107 [84%] [-20.00dB] [on] Rear Right: Playback 107 [84%] [-20.00dB] [on] Front Center: Playback 107 [84%] [-20.00dB] [on] Woofer: Playback 107 [84%] [-20.00dB] [on] Side Left: Playback 107 [84%] [-20.00dB] [on] Side Right: Playback 107 [84%] [-20.00dB] [on] -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1498129 Title: Asus Xonar U7 S/PDIF output not recognized by pulseaudio To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1498129/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs