AST file

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AST files contain PCM16 sound data. They're used in Super Mario Galaxy for musics, and possibly in other games.

They contain an header followed by a BLCK chunk. All the data in those files are big-endian, except where mentioned. All the offsets are absolute (from begining of file), except where mentioned. All the sizes are in bytes, except where mentioned.

AST header

The header is 64 bytes long.

Offset Size Description
0x0000 4 "STRM" (0x0354524D)
0x0004 4 Size of the BLCK chunk
0x0008 4 Unknown (0x00010010)
0x000C 4 Unknown
0x0010 4 Sampling rate in Hz
0x0014 4 ????????
0x0018 4 ????????
0x001C 4 ????????
0x0020 4 Loopstart position?
0x0024 28 Unknown