MATRIXSYNTH

Prototype 8 Voice Roland Jupiter 6

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Pics of the inside below.

"This is one of likely one Roland Jupiter 6 with 8 voices. It was a custom project made by Roland engineers in the 80s. Usually the JP-6 has a 2 voice board and a 4 voice board, but this one has custom code and a fully populated second 4 voice board for more polyphony or two 4 voice splits. It also has a custom RAM mod that gives you 3x the patch banks for more patch storage.

The synth itself is in good shape. There are a handful of slider caps that don't match (from Juno 106 and JX3P) but that's only cosmetic. It is fully functional with no issues.

If you want something nobody else has, this is it."

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Moog Grandmother Dark 32-Key Semi-Modular Analog Synthesizer SN 01884 w/ Original Box

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via this listing

Additional SYNTH CITY Listings

"Gently used Moog Grandmother Dark, USA made model that includes the factory packaging as shown."

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JUPITER-Xm w/Custom Gig Bag

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"This little legend is a compact synth powerhouse that punches way above its weight class. Packed with the iconic sounds of the Jupiter-8, Juno-106, SH-101, and more, the Xm brings vintage warmth and modern versatility in a portable frame. The ZEN-Core engine lets you dive deep into sound design, while the I-Arpeggio turns every jam into an instant vibe.

Perfect for studio sessions, live gigs, or couch-side noodling, this synth is ready to inspire. Lightweight, powerful, and dripping with sonic goodness."

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Twisted Electrons TherapSID MK3 SN TS322327

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Pics of the inside below.

This is the Mark III - final revision. Includes box, adapters, manuals, etc. Purchased directly from Twisted Electrons in May 2024. This is their last batch of TherapSIDs. They do not come with MOS chips but I'm including two modern simulated SID chips. They still sound great!"

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MFB Filter Box SN 08352

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Introducing Sapphire Chaops - expander module for Frolic, Glee, and Lark

VCV Rack - Sapphire - "Ice Station Oberon 11" - custom virtual synth

video upload by Don Cross

"Tonight I made a complex synth voice from several voices, but all tuned to the same V/OCT signal. Then I decided to play that synth voice using a virtual keyboard (Impromptu Twelve-Key). Usually I do generative stuff, but it was fun to make something more in the spirit of a custom synth, and then to perform that synth.

Download this VCV Rack patch from: https://patchstorage.com/sapphire-ice...

The Sapphire plugin for VCV Rack 2 is available at: https://library.vcvrack.com/CosineKit..."

Introducing Sapphire Chaops - expander module for Frolic, Glee, and Lark

video upload by Don Cross

"Chaops is a new 'chaos operators' expander module in the Sapphire plugin for VCV Rack: https://library.vcvrack.com/CosineKit... Here I show how to use Chaops to store/recall the state of Frolic, Glee, or Lark. Chaops also allows you to morph the 3D vector output on a spectrum between position and velocity, which provides a new range of 3D chaotic curves. Finally, Chaops can freeze/thaw the movement of the attached chaos module. All of this functionality can be operated manually or by input voltages."

VINTAGE ORIGINAL // KORG MS-20 // DUSTING OFF // OVERTONE SINIGING // PURE SOUND // no talking

video upload by LESINDES

"VINTAGE original KORG MS-20 still an unbeatable sound source. Despite some heavy crackling. How versatile it is you can hear. Dusting it off is really worth it. Here is a DRONE with some forgotten OVERTONE SINGING."

Viscount A.340 S "Performance" feat: UnoSynth by IK Multimedia

video upload by VSMI - Vintage Synths Made in Italy

"Viscount A.340 S 'performance'
61keys 'Made in Italy' by Viscount Organs made by Intercontinental Electronics spa (Mondaino RN)
Orchestra: Jazz Organ - Pipe Organ - Harpsichord - Strings - Accordion - Trombone - Clarinet - Vibraphone - Synth (this last preset is wonderful!)
4 programmable drum instrument - 10 Rhythm presets
Music & Rhythm program - Custom Rhythm
All sound from Viscount A340 except filtered line from IK Multimedia UnoSynth
thx to Giuseppe for fix this wonderful keyboard! "

Spaghetti - Firechild

video upload by MrFirechild

"Spaghetti (February 2025) by Mr Firechild.
The following synthesizers were used:
¤ Minimoog
¤ Black Corporation Xerxes
¤ ARP Solina with Sovtek Small Stone Phaser
¤ Moog One
¤ Behringer System 55
¤ TTSH
¤ Various Euro rack modules
¤ xils lab THE EIGHTY software synth
¤ Behringer VC340

Composed and produced by www.firechild.se"