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 |