Maximilian is an open source, MIT licensed C++ audio synthesis library. It’s designed to be cross platform and simple to use. The syntax and program structure are based on the popular ‘Processing’ environment. Maximilian provides standard waveforms, envelopes, sample playback, resonant filters, and delay lines. In addition, equal power stereo, quadraphonic and 8-channel ambisonic support is included. There’s also Granular synthesisers with Timestretching, FFTs and some Music Information Retrieval stuff.
If you’re interested in learning how to use maximilian, you can download it here:
There’s a command line version, an openFrameworks addon with examples, and also some Cinder examples.
You can check out some tutorials here.