I've tried the suggestions at https://wiki.archlinux.org/index.php/Ad … SB_devices and http://askubuntu.com/a/206233 but it has made no difference at all.
It happens fairly consistently, probably there are a few pops or crackles every 10 seconds or so. I'm using Pulseaudio and Gnome Shell. The unit works fine on any other OS. I also used a Behringer USB card for a while before buying this one, and the Behringer worked fine.
Any one have a suggestion for a fix?
EDIT: For some reason there is an option in Pulseaudio to select "Digital Output (S/PDIF) - Audiobox USB", even though there isn't an SPDIF output on the unit. If you select this the audio continues working through the main outputs, and since I did this the pops and crackles seem to have gone.
Last edited by themusicalduck (2012-11-23 23:23:59)