MATRIXSYNTH

Kawai K5m Vintage Additive Synthesizer

via this auction

"The backlight has been newly replaced. it is quite bright now."

Doepfer A-100CGK CV/Gate Midi Keyboard

via this auction

"49 KEY CV/GATE MIDI KEYBOARD --- WITH AFTERTOUCH AND 3 CV OUTS AND MIDI OUT. MORE INFO AND SPECS"

via this auction

"The EMULATOR III E III is a workhorse sampler synthesizer. Unlike later models, this is a much easier synthesizer to program; all controls are right in front of you. 8 MB
Measures:
Keyboard; 39 1/2” (W) x 18 1/2” (D) x 7” (H) 45 lb approx.
Case; 45” (W) x 24” (D) x 13” (H) 44 lb approx.
Retail price when new US$ 15,995 plus case"

Future Retro 777

via this auction
"THE LAST ONE BUILT BY FUTURE RETRO!!! BOUGHT ABOUT 6 MONTHS AGO DIRECTLY FROM JERED AT FUTURE RETRO!! SIGNED BY THE MAKER: JERED FLICKINGER... Originally built as a 303 clone, but it is and does so much more!!! 2 Oscillators with sub-oscillators, 3 Pole and 7 Pole filter, two different overdrive types and modulation galore!! Can also be used as a midi to cv/gate convertor. MORE INFO AND SPECS.

Kawai K3

via this auction

Note the worn touch membrane. A little glimpse of what's under for each selectable paramater. Digital synth with analog filters. Also capable of rudimentary additive synthesis.

1984 Yamaha KX5 Keytar Synthesizer

via this auction

Korg MS2000BR "Mint"

via this auction

"It's black, and there is one thing about this particular unit. I was developing a UV-reactive live performance, and at the time decided to outline all of the gear that I would use with blacklight-reactive paint. This was one of the units, but it never ended up getting used in my live sets (same with a keyboard). It's been in my smoke-free studio for about 6 months, and is in perfect condition, sounds and functions perfectly. The only thing is the green outline of UV paint on it. I can go over it with the corner of a lighter and that has seemed to work well to remove it on my other unit, but please let me know what you would like. I can send it as-is also. Again, this unit looks and functions PERFECTLY (and looks cool in blacklight now!)." Hmm... Makes me think CustomSynth.co.uk should offer fluorescent details for those of us with black lights.

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Seiko DS-202 Digital Keyboard + DS-320 Sequencer

via this auction

Anyone know more about these? Looks like a scaled down version of the DS-310.

Update via Qwave in the comments: "The DS310 was the digital additive synthesis add-on for the DS202 and DS101. I used to have the DS202 with the DS310.
http://till-kopper.de/seiko.html

The DS310 could only be screwed and connected on the left back of the DS202 and DS101 keyboards. The DS320 was always on the right side of the keyboards back panel.

The DS310 had the ability to create and store 4 (four( sounds. Each sound was made up from 3 different spectrums of 16 harmonics each. And these spectrums were crossfaded and overall envelopes by one of the 3 (or 4?) preset envelopes with variable time segments.

Because of the limited memory slots I wrote down the sound on paper too. I stil got some of the paper today. I also recreated two of my favourite Seiko sounds on the Waldorf WAVE's build in additive wave and wavetable generation pages.

The sound available through this additive synthesis were kind of a budged Synclavier to me then. You could do nice sounds unavailable be all synths under 10.000 US$ then (early eighties). But there was always one oscillator. So you needed to layer the sounds (available only on the DS202 keyboard if my memory is still right). Or use the DS202 build in single preset chorus for wider sounds. The low end was also very thin. So you usually ended up using extrem digital sounding things.

And yes, once you changed the spectra, the DS310 needed to calculate a second or two to make the new sound audible. No real time. But this was kind of stone age of digital synthesis in the years before the DX7.

I sold the Seiko to gain money to buy me a PPG wave 2.2 in 1987."

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