After a few minutes of running AH all game sounds become a high pitched whine, this is soon followed by a complete lockup which requires a reset.
I've tried reducing the DX sound acceleration and switching my RAM from 133 to 100mhz, neither of which make a difference. I have the exact same problem when playing Black & White, all my other games, directx or otherwise, run fine.
I have the very latest BIOS and video drivers, the latest VIA 4in1 drivers and DirectX 8.0a.
Specs:
Win98
1200Mhz Athlon T.bird (not overclocked)
Asus A7V-E mobo
256 PC133 RAM
Creative Labs Geforce2 MX 32mb DDR