This project uses a few open-source tools to power audio synthesis and conversion. In the spirit of transparency and respect for their licenses, we've listed them below along with how they're used.
All tools are used in compliance with their respective licenses.
FluidSynth is used to synthesize MIDI files into audio.
License: GNU Lesser General Public License (LGPL) v2.1
Source: https://github.com/FluidSynth/fluidsynth
We use FluidSynth as a standalone binary, without linking it to proprietary code.
FFmpeg is used to convert audio formats, including rendering to OGG.
License: GNU Lesser General Public License (LGPL) v2.1+
Source: https://ffmpeg.org
We use only LGPL-compatible components of FFmpeg and do not enable GPL or non-free modules. FFmpeg is used as a standalone binary and is not linked into proprietary code.
© 2025 Brian Hearn. All original code and content on this site is © 2025 Brian Hearn, and may not be reused without permission.