CAUD (File Format)

The CAUD format stores sound effect macros. It references one or more audio samples and controls how they play in-game. It's essentially a replacement for the SoundMacro system from the AGSC format in Prime 1/2.

Format

Type	Count	Name	Notes
FourCC	1	Magic	Always CAUD
u32	1	Version	Possible values: 0x2: Metroid Prime 3 E3 Prototype 0x9: Metroid Prime 3 0xE: Donkey Kong Country Returns
string	1	Macro Name	This is a zero-terminated string.
u32	1	Volume Group Count	Count of volume groups this macro is in.
string	Volume Group Count	Volume Group Name Array	Array of volume group name strings. These names are referenced by VolumeGroup script instances in MREA files.
u32	1	Unknown
u32	1	Unknown
float	1	Unknown
float	1	Unknown
u32	1	Unknown
u32	1	Sample Count	Count of audio samples in the macro.
Sample Info	Sample Count	Sample Array	Array defining all audio samples used in the macro.
End of File

Sample Info

To do: This is not complete!

Offset	Type	Count	Name	Notes
0x0	u32	1	Sample Info Size	Size of this sample info chunk, not including itself.
0x4	Asset ID (CSMP)	1	Sample ID	Asset ID of the audio sample.