If I have a SoundFont loaded on my Audigy, at random
intervals I suddenly get a huge burst of noise coming
out my speakers for a random amount of time and then it
stops, only to repeat again at a random time later.
Sometimes it's when I'm playing MIDIs, other times not
(e.g. I've just cold booted the system, loaded the
SoundFont and then it does it.)
If I unload the SoundFont it stops immediately, and it
doesn't happen if there is no SoundFont loaded. When
the sound is happening it sounds pretty much the same
as doing "cat /proc/kcore > /dev/dsp" so it looks like
there's some memory pointer bug in there somewhere...