actually when you emulate something to aim for accuracy I think it's better not to do this, as I think it would cause the sound not to be 100% synced with the video in many cases anymore.
Note: bleem! used this approach. It worked great at the time because many pcs werent up to full psx speed, but the sound <> video timing was really off at times. For accuracy, one would prefer perfect sync. But, in itself, it isn't a really bad idea. I dunno if its easily possible with VBA though. AFAIK VBA sound isn't something like XA audio (like Jamie said).
Note: bleem! used this approach. It worked great at the time because many pcs werent up to full psx speed, but the sound <> video timing was really off at times. For accuracy, one would prefer perfect sync. But, in itself, it isn't a really bad idea. I dunno if its easily possible with VBA though. AFAIK VBA sound isn't something like XA audio (like Jamie said).