A standard VCO can be transformed into a very special sound source with a good filter. If you prefer "noisy" or "distorted" sounds, 100 grit might be a good idea.
If you want to add these types of sounds, you also have Befaco Plethora, two digital sound sources with three banks of noise-based algorithms.
The great thing about this module is that it incorporates two multimode resonant filters. It can be used for textures and drones, and it also shines on percussion.
-- ferranadsr
that befaco plethora looks so amazing, but it's expensive. I wonder if it would be worth the extra 200$ over the mutable peaks, I mean it would be it seems but....my rig is already pretty noise....damn this is hard lol