Here's an interesting source of inspiration for experimenters

[Mark Hammer]

http://www.jomox.com/product_details.php?lang=2&category=&product_id=3

Cute!!

[Strategy]

JOMOX stuff is great! I don't really understand how this works but it sounds great!

[Mark Hammer]

Near as I can figure, there are envelope controlled filters in the feedback loop......for starters.  That front panel looks kind of like cha-cha lesson diagrams, though, doesn't it?

[Processaurus]

That looks like a much nicer version of something I tried with a modded DD-2 with in and out jacks for the delay regen, and a envelope filter in the regen loop, where the envelope was sidechained to the input of the delay.  It was great because the delays would self oscillate while you played but when you stopped the filter would sweep down and kill the oscillation.

[donald stringer]

This thing  falls under the category of something I must have but never will be able to afford. But with some of the reverse enginering  skills that are posessed on this forum it wont be long before there is an reasonable facsimile.