Don Cross does some weird things with audio, and has some cool samples and code clips. He also has lots more links, and stuff on Fourier and Wave transforms. Check out his Sonic audio programming language.

Toshio Iwata is offering more tools to analyse digital filters.

Glowing Coast Technology offer AudioSuite and a wealth of technical information on filters...I like the warning about cannibalism too!

Bjorn Wesen has published his thesis: a streaming MPEG3 decoder on a Texas DSP

Jeffrey Taft has a useful selection of Java tools.

Commercial Sites

If you need an audio editor with some signal analysis, I recommend Syntrillium's Cool Edit Pro.

An excellent MPEG codec is available from the folks at Q-Design, along with other compression software - for Mac and PC.

If you're looking for more information on digital filters and DSP, try Bores Signal Processing.

If you want your site posted here, let me know!