This is a web-based player for AST audio files. Try it here.
AST is a file format for storing audio streams which is used in some games made by Nintendo for the GameCube and Wii, including The Legend of Zelda: Twilight Princess, Super Mario Galaxy, and Super Mario Galaxy 2.
Also included in this repository is ast_converter.c, a command line program written in C which converts AST files into WAV format.