667aaea554
it's multi DAC / playback channels is not that good. Enabling vchans make the bug more visible since playback allocation will look for possible free hardware channels first (i.e: the next DAC, the very first has been consumed by vchan mixer) which in this case has been proven faulty. Tested by: Dominic Fandrey <LoN_Kamikaze at gmx dot de> URL: http://lists.freebsd.org/pipermail/freebsd-stable/2007-December/039022.html