Comment 87 for bug 190754

None of the above daemon.conf settings or realtime kernel worked for me, but these did (on SoundBlaster Audigy 24bit, using CA0106 drivers):
"
high-priority = yes
nice-level = -14
no-cpu-limit = yes
default-fragments = 100
default-fragment-size-msec = 20
"
If i raise or lower the fragment size from that it doesn't work anymore, yet that alone doesn't seem to have any effect. There is still some tearing if i use multiple sound sources simultaniously for long enough time, but i can live with that.