I have the soundtrack for the game Magical Tetris Challenge Ripped from the XA files of the Playstation version of the game. it is in true stereo , & it has a higher sample rate than the N64 version.
here are the links:

MP3:http://www.mediafire.com/download/dhb8f7vg8zmlesu/Masato_Kouda_-_Magical_Tetris_Challenge_Soundtrack_%28MP3%29.rar

OPUS CODEC:http://www.mediafire.com/download/1yzyud0fh5z3dne/Masato+Kouda+-+Magical+Tetris+Challenge+Soundtrack.rar

Hey, great contribuiton!
Thanks, i'll give it a listen