If you're a programmer, you might be more interested in Pure Data (http://puredata.info/ http://puredata.info/) or cSound (http://csound.sourceforge.net/ http:/

If you're a programmer, you might be more interested in Pure Data (http://puredata.info/ http://puredata.info/) or cSound (http://csound.sourceforge.net/ http://csound.sourceforge.net/). Both are free. There's also Renoise (http://www.renoise.com/ http://www.renoise.com/) which is inspired by old school mod trackers. There's a free demo, and the full version is really cheap.