30 lines
1.4 KiB
Markdown
30 lines
1.4 KiB
Markdown
# SFOTool for TinySoundFont
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A tool to create heavily compressed .SFO files from .SF2 SoundFont files.
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## Purpose
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SFO files are just regular SoundFont v2 files with the entire block of raw PCM samples replaced
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with a single Ogg Vorbis compressed stream. Unlike .sf3 files, which can have every separate font
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sample compressed individually, this will compress the entire sound data as if it were a single
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sample. This results in much higher compression than processing samples individually but also
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higher loss of quality.
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## Usage Help
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```sh
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sfotool <SF2/SFO>: Show type of sample stream contained (PCM or OGG)
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sfotool <SF2> <WAV>: Dump PCM sample stream to .WAV file
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sfotool <SFO> <OGG>: Dump OGG sample stream to .OGG file
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sfotool <SF2/SFO> <WAV> <SF2>: Write new .SF2 soundfont file using PCM sample stream from .WAV file
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sfotool <SF2/SFO> <OGG> <SFO>: Write new .SFO soundfont file using OGG sample stream from .OGG file
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```
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## Making a .SFO file from a .SF2 file
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1. Dump the PCM data of a .SF2 file to a .WAV file
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`sfotool <SF2> <WAV>`
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2. Compress the .WAV file to .OGG (i.e. with [Audacity](https://www.audacityteam.org/download/legacy-windows/))
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Make sure to choose the desired compression quality level
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3. Build the .SFO file from the .SF2 file and the new .OGG
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`sfotool <SF2> <OGG> <SFO>`
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# License
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SFOTool is available under the [Unlicense](http://unlicense.org/) (public domain).
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