nolibgs_hello_worlds/VAG/README.md

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VAG files

VAG is the PlayStation single waveform data format for ADPCM-encoded data of sampled sounds, such as piano sounds, explosions, and music. The typical extension in DOS is “.VAG”.

See http://psx.arthus.net/sdk/Psy-Q/DOCS/FileFormat47.pdf, p.209

WAV creation

Use ffmpeg to create a 16-bit ADPCM mono WAV file - change -ar to reduce filesize (and quality)

$ ffmpeg -i input.mp3 -acodec pcm_s16le -ac 1 -ar 44100 output.wav

You can use Audacity to edit sound.

WAV to VAG convertion using WAV2VAG

Get here : https://github.com/ColdSauce/psxsdk/blob/master/tools/wav2vag.c

Change -freq according to the -ar setting above

$ wav2vag input.wav output.vag -sraw16 -freq=44100 (-L) 

Bug ?

After conversion with WAV2VAG, the resulting VAG will sometimes have a pop at the very beginning and/or end of the file.

You can check (and delete) this with PsyQ's VAGEDIT.EXE.

You can also force the sampling frequency of an existing VAG file.

VAG & SPU Docs

See