Behringer CAT

Great engineering here - they have all of the functionality (and the look and feel) of the original and although it is necessarily made on the cheap so the knobs and sliders don't feel great, it is nonetheless a powerful piece of kit. The controls are much smaller than on the original, which makes it fiddly to use in a keyboard rig (for me anyway), and the whole thing is rather lightweight so needs strapping down onto an appropriately angled surface - not easy. I don't think it's good for a live environment without some serious extra work. The analogue interfaces seem to work OK (3.5mm jacks though, so some bespoke cabling needed to connect up to the rest of the oldskool analogues) . Unit ships with the usual amateur wall-wart power supply (particularly annoying for UK customers is the clumsy and ill-fitting europlug adapter which is the ultimate in cheapskate shortcuts - it's the proverbial "ha'p'worth of tar".). For this price, though, it's a no-brainer to fatten things up on your existing monosynth, whatever it is.