This is a port of the sound library written by Kazuki Muraoka for Metal Gear Solid.
This library was later expanded for Metal Gear Solid 2 as well as the Zone of the Enders series.

The library includes a PlayStation SPU emulator for audio synthesis.
This is adapted from rpsx's SPU implementation.

The following sources were referenced to improve rpsx's SPU implementation and fix bugs:

• nocash's psx-spx hardware documentation.
• DuckStation's SPU implementation.
• Mednafen's half-band reverb resampling implementation.

This project is still very much a work-in-progress. Expect some songs to sound slightly (or very) incorrect.
In addition, the reverb algorithm isn't bit-accurate as it uses floats to avoid dealing with rounding behaviour.

This project only currently supports writing the output to a wave file.

make

raven [-d] [-r] [-o output] [-l loops] [-s song] mdx wvx [wvx2] [wvx3]

One mdx file and up to three wvx files can be provided:

• mdx files contain the sequence data for songs.
• wvx files contain the waveform data for songs.

The resident wvx file wv00007f.wvx located in the init stages contains common samples used by all songs.
Some songs require additional wvx files, these are found in the same stage as the mdx file.

The following options are supported:

-d          Enables debug output.
-r          Forces reverb off.
-o output   Specifies the name of the output wave file.
-l loops    Specifies the number of times to loop the song.
-s song     Specifies which of the songs from the sequence data to play.