Fragment : Fragment is a collaborative cross-platform audiovisual live coding environment with pixels based real-time image-synth approach to sound synthesis, th...
Essentia : Open-source library and tools for audio and music analysis, description and synthesis
Wave.js : Audio visualizer library for javascript. Create dynamic animations that react to an audio file or audio stream.
Band.js : An interface for the Web Audio API that supports rhythms, multiple instruments, repeating sections, and complex time signatures.
Javascript Sound Kit : The Javascript Sound Kit is a wrapper around the ActionScript Sound Object, it makes it possible to use the Sound Object in Javascript the same way yo...
The Synthesis ToolKit in C++ (STK) is a set of open source audio signal processing and algorithmic synthesis classes written in the C++ programming language.