Spectrum analyzer help musicians transcribe recorded music, analyze and identify frequencies visually. Site includes downloads, screenshots, and descriptions of algorithms used. (C++) [Windows]

MIDI and audio sequencer, synthesizers and FX, and a soundfont sampler and wave editor. Site includes project info, downloads, and a link to the main developer. (Delphi) [Windows]

Module sound player with a console interface. Site includes source code, screenshots, and project information. [Linux]

Command line tool designed for multitrack audio processing which can be used for tasks like audio playback, recording and format conversions as well as mixing and signal recycling. Includes documentation and links to third party graphical user interfa...

Sound editor modeled after Emacs and can be customized and extended using either Guile, Ruby, or Forth. Site contains source code and a user manual. [Linux]

Multi-track tablature editor, compatible with Guitar Pro files. Site includes screenshots, downloads, forum, documentation, and a donation form. (Java) [Cross-platform]