So you're using changeset
61112 and this happens? Is it PAL or NTSC? (you might need to force PAL detection through cpu options)
Did you compile and configure the latest dfsound spu plugin?
- high compat mode
- gaussian / cubic interpolation
- full reverb mode
- spu irq #1 on - mgs fix (wait for cpu action)
I never checked MGS with the latest win32 builds so I'm not sure.