What I think is going on is that your soundcard(or drivers) are giving you a little distortion when sound inits. The only way to fix that is to keep the sound stream "alive" at all times. that shouldnt' be too hard to add.
I don't know if this has been resolved yet, but on a version I nabbed from /stuff/ a few months ago, playing a corrupt MOD file in a huge playlist with crossfading would cause an Invalid Page Fault on 9x/2000/XP. I was playing a huge list for a convention for background noise, so to trigger it takes quite a bit of time.