post the pulseaudio verbose log https://wiki.ubuntu.com/PulseAudio/Log
card 1: Pro [SB X-Fi Surround 5.1 Pro], device 0: USB Audio [USB Audio] Subdevices: 0/1 Subdevice #0: subdevice #0 card 1: Pro [SB X-Fi Surround 5.1 Pro], device 1: USB Audio [USB Audio #1] Subdevices: 1/1 Subdevice #0: subdevice #0 do device 1 support digital ? # 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 http://git.alsa-project.org/?p=alsa-lib.git;a=blob;f=src/conf/cards/USB- Audio.conf -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1051665 Title: [USB-Audio - SB X-Fi Surround 5.1 Pro, playback] Underruns, dropouts or crackling sound To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1051665/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
