Hi Chris

Have a look at the IEMLIB external. It includes several high order filters - and if you want more insight knowledge you can always take a look at the source code :-)

Cheers Soeren

Just wondering how people build multi-pole filters in Pd? It seems that i've done about all I can do with just [vcf] and i'm wondering if anyone has any doc/pointers on building filters from scratch using the lowpass/bandpass objects or even links to basic filter theory for the layman explained. I've done some searches on google, but now i'm pretty much stumped. Basically i just want to get some fatter sounding acid happening. Suggestions?