During Shadow Hearts 2 Convenant, everytime I get into a boss battle I hear prolonged strange beeping sounds layered over the normal audio. Everything else runs fine and the audio is always fine except for boss battles.

My plugin is SPU2, its set to Mixing Settings: interpolation 1-Linear (recommended) and Output Settings: 3-XAudio 2(recommended).

I've messed with everything in these settings but nothing fixes it, do I need to download a new plugin? If so what? Anyone had this problem before?

Thanks!