Yet another FF9 problem...

Howdy! After a few minutes of playing through FF9, a really annoying music tone starts to play in the background. The music just holds that tone for a really long time, and even plays it in the background of regular music. Any help would be appreciated!

Heres my plugin info (even though you probably won't need it. Seeing as how this is a sound problem)

Plugin: Pete's DX6 D3D Driver 1.1.75
Author: Pete Bernert
GFX card: RADEON 9200

Resolution/Color:
- 800x600 Fullscreen - [32 Bit]

Textures:
- R8G8A8A8
- Filtering: 6
- Hi-Res textures: 1
- VRam size: 128 MBytes

Framerate:
- FPS limit: on
- Frame skipping: off
- FPS limit: 60

Compatibility:
- Offscreen drawing: 2
- Framebuffer texture: 0
- Framebuffer access: 0
- Alpha multipass: on
- Mask bit: on
- Advanced blending: hardware

Misc:
- Scanlines: on [254]
- Unfiltered FB: on
- Dithering: off
- Screen smoothing: on
- Full vram: off
- Game fixes: on [00000200]