Rare Custom Commodore C64 SID Synthesizer

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via this auction

"in excellent condition, made from a vintage Commodore 64 case that will have minor wear due to its age.

**This is a rare custom designed synth made from a Commodore 64 case and that uses 2 SID 8580 chips.
its got a ton of power and features. killer synth for chip tune.

fast and hands-on with heaps of crazy features (3-way-polyphony, wavetables, triggers, special drum engine, bassline engine, etc).

The sound chips are the later SID 8580 (from the mid 80s original C64s), much better than the earlier 6581 ones the SID station uses. It can combine waveforms, like TRI+PULSE, SAW+PULSE, etc, the old ones couldn't do it. Gives it a much wider sound spectrum.

it has two independent SIDs, each with own MIDI channel and seperate audio outs, so one can do a bassline and the other can do skanks for instance while you can tweak both in realtime, with the knobs or MIDI controllers."