Siel DK-80 For Sale. Dynamic Bitimbric Synthesizer. Vintage Analog Polysynth. Italian made. Inside are SSM chips - this family of chips is what made the Sequential Prophet 5 early revisions and many other classic synths sound so warm and juicy. It's 12 note polyphonic, and you can play 2 sounds at once, so think of this as 2 instruments in 1. The DCOs have volume levels for several divided octaves - the ability to play multiple octaves per voice/note can result in some really fat sounds you can't make on a lot of other models. Though we haven't verified this, weve read that this unit can be edited using MIDI continuous controllers, which would make it very easy to control parameters from most MIDI sequencers for real time sound manipulation during sequence playback. This Seil synth responds to velocity as well.