de-interleave multi-channel .wav files

[Tangytube]

im trying to rip the interactive music from littlebigplanet 1. i found a program to open and extract FSB files, so all was going pretty well until i opened the extracted file and it sounded like a mess. when i looked back at the program, i noticed it said "This sample have multiple channels, and will most likely not play properly once extracted." i have no clue how to get it to play properly. ive searched around like mad, and all i could find was a program for mac (which i cannot use being a windows user). if anyone could help it would really be appreciated. i just need a way to separate the tracks into multiple files. i dont use forums much so sorry if im not doing this right LOL