halfway through the sound, or the game?
because it might be the sound itself then that blocks of the right channel...

also, there is a limit to 32 sounds at the same time (hardware limit i believe), if you have more, then these kind of errors might occur...

regards,

Formerly known as dennis_fantasy
Portfolio - http://www.designorhea.com/
Project - http://randomchance.cherrygames.org/