Emulator

What steps will reproduce the problem?

1. Just playing the game will trigger it.

What is the expected output? What do you see instead?
Expected to hear a fully working BGM in areas, but instead it doesn't work,
or you hear it partially with missing parts of the music.

What version of the product are you using? On what operating system?
All the way from r4900 up to r5021. Also tried both the 32-bit and 64-bit
versions. Operating System is Windows 7 Ultimate (x64)

Please provide any additional information below.
When you DO hear BGM, it's not the actual correct BGM, but rather a bad
version of it. Example would be in the Tyrant battle, you're supposed to
hear a nice tune and instrumentals, but instead you only hear one part of
the BGM without all of that. In almost every other case there's just no BGM
at all.

The Resident Evil 0 Audio Fix apparently used to fix this issue in the
past, but is no longer working in new revisions according to other users as
well.