Raymond: thank you for your time and effort! Following your advice I was able to configure iec958:CARD=U7 and point it at the correct hardware device. The following aplay command goes to the digital output:
$ aplay -D iec958:CARD=U7 test.wav However, the pulseaudio still redirects both, Analog and Digital (S/PDIF) outputs to the same analog output. There are no special characters in the card name. Here is an excerpt from /usr/share/alsa/cards/USB-Audio.conf: USB-Audio.pcm.iec958_device { "Xonar U7" 1 ... } The outputs of pactl list and aplay -L are attached. So, what shall I do with pulseaudio to recognize the iec958 output? ** Attachment added: "aplay -L output" https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1498129/+attachment/4585449/+files/aplay-L.txt -- 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