64th Note 1_1 USF player - Play N64 music (in the form of compact USF files) in Winamp.

Here is the latest version (1.1) of the premiere USF player, which plays music ripped from N64 games. It uses much less virtual memory than 1.0, so it will run on some more configurations.

USF files and source code available at http://www.hcs64.com/usf

This is a well put together input plugin (especially the 1.1 version over the 1.0 build) and with a good range of options and features to help you get the most out of the N64 game music that you're playing.
So go on re-live the nostalgia and enjoy it all.