BAACL (File Format)

BAACL (Binary Audio Attenuation CuLling) is a file format used in Nintendo Switch games. It controls audio attenuation by distance.

File Format

The BAACL file format is a very simple format and consists of the following structure:

Offset	Type	Description
0x00	Char[4]	File magic. Always AACL in ASCII.
0x04	UInt16	Byte-order-mark. FE FF for big endian, FF FE for little endian.
0x06	UInt16	Version number.
0x08	Float	Culling fade start distance.
0x0C	Float	Culling fade distance.
0x10	Int32	Unknown. Probably a parameter or flag.

Version List

Version	Found in
0.2	Animal Crossing: New Horizons ARMS Game Builder Garage Mario Kart 8 Deluxe Nintendo Labo - Toy-Con 02: Robot Kit Nintendo Labo - Toy-Con 03: Vehicle Kit Nintendo Labo - Toy-Con 04: VR Kit Nintendo Switch Sports Ring Fit Adventure Splatoon 2 Splatoon 3 Super Mario Bros. Wonder Super Mario Maker 2 The Legend of Zelda: Breath of the Wild (Nintendo Switch)

Tools

The following tools can handle BAACL files:

• (none)