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* VGM7z format specification v1.00
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1. Purpose

There is a desire to be able to transfer entire VGM format soundtracks
in a single file with minimum size. That is what VGM7z is for.

2. Short version

A VGM7z file is a 7-zip archive (with LZMA compression) containing all
the files normally found in a VGM pack, except the VGMs are all
uncompressed.

3. Additional notes

There should NOT be any embedded folder data in the archive. Extraction
software should ignore any folder data.

The VGM files should be uncompressed to allow the LZMA algorithm to
attain the best compression.

It would make sense to use a high level of solid compression on the 
VGM7z container archive.

The M3U playlist should refer to the uncompressed files; hence it is
recommended to use the .vgm extension throughout. VGM players should
all already support GZipped files with the .vgm extension.

Player software should attempt to use any M3U playlist found in the
file. Behaviour is undefined if more than one playlist is included;
thus, the playlist should include every file.

4. Contact

If there's more you think needs to be added, contact me.

org.smspower@maxim