Raymond thank you for your help. I am still having problems.
If I run aplay -l or use alsamixer my card is reported as "Xonar U7 Echelon Ed." here's the relevant part from aplay -l card 3: Ed [Xonar U7 Echelon Ed.], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 card 3: Ed [Xonar U7 Echelon Ed.], device 1: USB Audio [USB Audio #1] Subdevices: 1/1 Subdevice #0: subdevice #0 card 3: Ed [Xonar U7 Echelon Ed.], device 2: USB Audio [USB Audio #2] Subdevices: 1/1 Subdevice #0: subdevice #0 So I add # number for the iec958 device can be changed here. USB-Audio.pcm.iec958_device { # "NoiseBlaster 3000" 42 "USB Sound Blaster HD" 1 "Xonar U7 Echelon Ed." 1 to USB-Audio.conf and restart audio with "pulseausio -k && sudo alsa force-reload" and nothing changes As before, pavucontrol shows "Digital Stereo (IEC958 Output)" as one of the configuration options for card "Xonar U7 Echelon Ed." but when I select that option the card plays analog not digital. So - either I need to do something else or I have the card name wrong. How can I prove I have the correct card name? -- 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