This is the specifications for the audio file which is handled by the Game Extractor plugin Exporter_Custom_VAG_Audio.

Endian Order:	Little Endian
Compression:	none
Encryption:	None

This format is used by the following Games:

Space Invaders [PSX]	*.wav
Big Mutha Truckers [PS2]	*.snd spd
Driver 2 [PSX]	*.wav
Enter The Matrix [PS2]	*.vag
Summon Night 3 [PS2]	*.vag
Black Matrix 2 [PS2]	*.vag
Sacred Blaze [PS2]	*.vag
Summon Night 4 [PS2]	*.vag
Summon Night EX-Thesis [PS2]	*.vag
Dragon Shadow Spell [PS2]	*.vag
Summon Night Granthese [PS2]	*.vb

This is the format specification information:

Playstation VAG Audio Format

Game Extractor is able to read files of this type, as well as files from thousands of other games. To give it a try, download Game Extractor (Basic Version) for free, and see what it can do.

For further information on this format, refer to the source code on our GitHub repository.