I’ve just finished uploading a new ugen for SuperCollider called DFM1. It’s a port of Tony Hardie-Bick’s DFM1 filter, which is a great sounding, overdrivable, self-oscillatable, incredibly detailed model of an analog filter. Full source code is available, so if you’ve got an interest in DSP coding it’d be an excellent example. If you just want to make some strange noise it’s pretty damn good for that as well. You can download DFM1 from here.