JSyn - modular synthesis API for Java.
JMSL - Java Music Specification Language
PortAudio - cross platform audio I/O API for 'C' is the home for various audio and music projects by Phil Burk and Mobileer Inc.

Latest News

12/16/12 JSyn Beta 16.5.14 Released - A new version of the "Pure Java" JSyn has been released. Downloadable JAR and release notes here. This version includes crossfading between regions in the sample queue.