Audio problems on Windows.

[craneee]

Hi, I just started using the emulator and everything is perfect, im playing Kingdom Hearts Birth by Sleep, the game runs 30/30fps, 100%speed, but everytime someone speak or a different sound plays in a cutscene, the audio cuts, gets kinda glitching, and the speed goes to 50%. Is this normal? Anything I can do to fix the audio and keep the graphics high?

I have a GeForce GTS 450 1GB, Phenom x4 3.4, and 4gb DDR3 1600MHZ, I'm using Windows 7x32 Ultimate.

Thank you.