(Kingdom Hearts 1.5) Having an issue were there is no audio except the opening cutscene

I recently heard about Shadps4 and decided to try my luck getting & playing Kingdom hearts. After trouble shooting i got the game to work and it plays well. The problem is there is no audio whatsoever. The only audio is the opening cutscene. Ive tried everything that i could find...updated drivers, changed audio settings, deleted and redownloaded, and still nothing. Im not sure what the problem is or how to fix it and would greatly appreciate help.