d'Oh, forgot about SampleRepeatPosition, that does the trick ~ Anyway, when you disable any modulators and play a sound with UseSampleHz at the exact sample length, it does end up looping a bit.
By the way, concerning triggering sound playback. Would it be a idea to add a offset ( in ms. ) property to PlaySound? That way you can mimic a sound-buffer and get sounds to play exactly in sync ( in theory ).
K