GEISS MATRISEQUENCER 250 - Handmade Miniature 1/6 scale

video upload by Ronaldo Lopes Teixeira ROLT

Studio Electronics SE3X - Paraphonic Drum Sounds Tweaking

video upload by VCO USA

"Using Paraphonic Mode and MIDI CC#'s, we create mild to wild percussion sounds on the SE3X.. Now if we only had more hands to tweak knobs with.."

YAMAHA CS50 Analog Synthesizer

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Tone Tweakers eBay

Tone Tweakers Reverb

"This CS50 is absolutely beautiful, meticulously refurbished by us and in exceptional physical condition as well as excellent working order, unlike most. This process required approximately 20 hours of skilled labor. The power supply was rebuilt as a precautionary measure, in an effort to extend this units life well beyond others you may find. Tuning trimpots were replaced to make tuning much easier and more stable. Logic ICs were replaced for longterm reliability. Oscillators were calibrated so this instrument is properly in tune. All key contacts were cleaned. All pots were cleaned and lubed."

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Elta Music Solar-50 with full FX set

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"Rarish synth with 50 oscillators of pure fun. Under one year old. Almost like new and everything in the image is included, also including full set of 12 FX cards. One minor flaw is that one of the leds doesn't work, but the related oscillator works fine."

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Novation AFX Station Limited Edition 25-Key Analog Synthesizer

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Chamber of Sounds Droneulator 2013

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"Discontinued Chamber of Sounds 'Droneulator' 3 Oscillator Palm Synth. 4 knobs, 3 switches plus an Opto Cell. No instructions, no labels, plug it in and freak out. Awesome little noise box."

You can find demos in previous posts here.

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JEN SX-2000 synthetone 1979 SN 4146

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"JEN synthetone SX-2000 in great condition. Full revised (new key contacts, new transistors, calibrated, tuned, cleaned).

- Monophonic
- 44 keys
- 7 presets (but useless if you want to create your own sound and have fun with it! )
- 4 octave range
(32', 16', 8', 4')
- Wavefoorm : sawtooth, square, 2 rectangular waveforms
- VCA and VCF envelopes
- LFO : Square or triangle waveforms with intensity and speed control (it can modulate VCO or VCF)
- Glide control (portamento)
- Tune control fader

This lovely mono synth can be a real beast in studio or stage with some effects in the chain (like some guitar pedals).

It's also possible to upgrade it with mods (add CV/gate or other controls...)"

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Mutable Instruments Ambika Synthesizer w/SMR4 Filters

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KORG MONO/POLY MP-4 w/ MIDI

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"Work list (Excerpt):

Change all elec. caps and opamps,
New transistors and opamp installed on power supply board.
Change transistors in DAC part and opamps on CV route on key assigner board with new ones.
New "spark-killer" capacitor installed (relocated on power switch pins).
Keys knobs, switches and jacks cleaning.
CHD MIDI installed.
Adjustment."

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Yamaha TG33 Synth Module, Dynamic Vector Synthesis SN QPO1086

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Waveform List below.

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