Thanks for your thoughts guys. Clock mismatch was the clue :o I had been a bit lazy. While switching the output device I'd neglected to also switch the input device, so jack was seeing two slightly different 48kHz clocks. Switch both at the same time and the problem disappears. As a matter of curiosity I wonder if we can work out what the actual difference is. Would the Xrun occur when there was a one frame difference, one period, or 1 buffer? It's running at 256 frames per period and 2 periods per buffer. The xruns occur every 11 minutes (and a few seconds). As I said at the start, this is my 'office' machine and has *no* optimisations. -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
