Cheetah MS-6 Polyphonic Analogue Synth with MAAD Upgrade

via this auction

"This unit has been fitted with the MAAD firmware upgrade which gives the MS-6 the following features:

* MIDI bank select (CC #0), globally and per-part.
* Program change per-part.
* Remote control of all tone edit parameters using CC messages, both in tone and performance mode.
* No more partial drop-outs at bottom C (130.8Hz).
* Three more DCO shape settings, both for DCO A and B: off, pulse + triangle and pulse + sawtooth. The new pulse shapes can use PWM as well.
* Extended SysEx support: single patch and edit buffer dumps + requests, full dump and status requests.
* Mono mode, per-part, with a choice of always retriggering the envelopes or to not retrigger when playing legato (i.e. pressing a new key before releasing the current one).
* Portamento, per-part, constant-time (0.015 - 18.3 s) or constant-rate (400 - 0.44 semitones/s). Full-time or fingered (i.e., only in mono mode when playing legato).
* Support for bank 7 tones in performances

These upgrades enable the MS-6 to be used with modern DAW and MIDI controller set-ups and make editing considerably easier than using the front panel interface. You can also set each oscillator to off and set the filter to self-resonate for sine-wave like tones and percussion.

The MAAD website is an excellent resource & contains many helpful hints and tips for the unit and also sells spares."