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prosperon/source/engine/thirdparty/TinySoundFont/sfotool/README.md

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SFOTool for TinySoundFont

A tool to create heavily compressed .SFO files from .SF2 SoundFont files.

Purpose

SFO files are just regular SoundFont v2 files with the entire block of raw PCM samples replaced with a single Ogg Vorbis compressed stream. Unlike .sf3 files, which can have every separate font sample compressed individually, this will compress the entire sound data as if it were a single sample. This results in much higher compression than processing samples individually but also higher loss of quality.

Usage Help

sfotool <SF2/SFO>: Show type of sample stream contained (PCM or OGG)
sfotool <SF2> <WAV>: Dump PCM sample stream to .WAV file
sfotool <SFO> <OGG>: Dump OGG sample stream to .OGG file
sfotool <SF2/SFO> <WAV> <SF2>: Write new .SF2 soundfont file using PCM sample stream from .WAV file
sfotool <SF2/SFO> <OGG> <SFO>: Write new .SFO soundfont file using OGG sample stream from .OGG file

Making a .SFO file from a .SF2 file

  1. Dump the PCM data of a .SF2 file to a .WAV file
    sfotool <SF2> <WAV>
  2. Compress the .WAV file to .OGG (i.e. with Audacity)
    Make sure to choose the desired compression quality level
  3. Build the .SFO file from the .SF2 file and the new .OGG
    sfotool <SF2> <OGG> <SFO>

License

SFOTool is available under the Unlicense (public domain).