A high quality MP3 encoder
Nyquist is a language for sound synthesis and music composition.
Linux Studio Plugins Project
A customized version of Audacity
Machine graph audio engine for computer games
Extend abcm2ps to support direct generation of PNG, SVG and PDF files
What's inside your mp3 files REALLY ?
Denon DN remote interfaces
BASS audio library add-on based on ZXTune library
3D video music media player lyrics subtitles etc...