Fragmented sounds on older token machines and others.

I was wondering if anyone could please help me out with a sound issue?

Whenever I play old school token machines i.e. Cash Counter, Line up, Flash Cash Etc...they always sound like the speaker has blown or there is a loose connection. I use mostly mfme v3.2 for them but the same applies if I use other emulators. I don't have a problem with my pc because all other games sound fine. Everything else with my sound hardware is good and works correctly, Could this be something to do with the sample rate or summit? It would be good if the sounds could play properly instead of fragmented.

Thanks K.S.

is on old machines.