This is probably completely unrelated to the scope of HAC 2 and may not even be possible, but is there a chance of fixing the sound glitches in Halo when playing at anything higher than 30 fps?

What I mean is, when you're playing at extremely high framerates the sound effects tend to get cut off, or slightly distorted. Enabling 30 fps cap fixes this problem, but I can't bear actually playing at that framerate. Vsync is better, but then you have input lag.