I found this - http://www.harmony-central/Computer/Programming/ which is a nice sound processing link page and http://users.iafrica.comk/k/ku/kurient/dsp/algorithms.html is exactly what I've been looking for - C source code for all major sound effects. --- I also have an excuse for those who'd complain I'm posting irrelevant stuff here: OSS & Perl are mentioned in the first one :-) Tomas