MATRIXSYNTH

Monday, March 16, 2026

Simmons SDS6 Super Sequencer w/ Memory Issue

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via this Vemia listing

Click the auction link on top when you get there for additional listings.

"Simmons SDS6 rare drum sequencer. Very rare drum / trigger sequencer. In great cosmetic condition. Many of the push buttons have recently been replaced. **It comes up with ‘memory error’ so it will need a service.** No UK VAT charged. 115V.

VEMIA can collect and pack: 18GBP."

Sequential Circuits Studio 440 SN 00582

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via this Vemia listing

Click the auction link on top when you get there for additional listings.

"Probably one of the best examples of the classic Studio 440 anywhere.
Sampler/sequencer/drum machine from Sequential Circuits, circa 1987. S/N 582. The present owner bought this from Wine Country in 2007. It has version 2.30 (SCSI) operating system by Pointsource, 512K RAM, 12-bit sampling, up to 35 seconds sample time (at 16kHz, max rate is 44kHz), 50,000 note sequencer capacity, 8-note polyphonic, stereo audio outputs as well as individual track outputs 1 to 8. And, of course, it has MIDI – very easy to sequence up other synthesizers.

Quite a lot of functionality in a single box and easy to operate. The Studio 440 is fairly rare (about 600 made through 1986, ’87) and considered one of the pioneering forerunners to the later MPC units of the nineties.

This unit is in excellent condition – the cosmetics are very good, with tiny scratches around some of the edges of the enclosure. The main panel paintwork, graphics, knobs and switches are like new. No known issues operationally. Disks load fine, sound configuration, sampling, sequencing and audio all good, menus look normal. Display backlight is good, all hardware good. An easy instrument to get to know and operate, and sounds pretty good for a 12-bit sampler. Includes original manual (NOS from Wine Country), some service data, a number of sample disks, head protector disk (this will have to be ejected following transit) and a survival kit consisting of 8 spare touch pads (unused), two NOS pots, one switch module, one I-624 voice chip. The mains connection is standard IEC socket. The buyer will have to acquire their own mains cord that suits their country and change the internal voltage setting if necessary (explained in the manual. The present setting is 230V).

Weighs 10kg. Unit measures approximately 60x30x16cm (including manual, disks and spare parts). Packaged up, will be maybe 10% larger and heavier. The item is located in New Zealand. Examples of approximate door to door air-freight shipping costs, including insurance, at the time of writing, are: UK/Europe, 300GPB/Euros. USA, $500USD (US tariffs may change at short notice). Australia, $250AUD. Costs to be confirmed upon sale. Importing customs charges and tax are buyers responsibility. You're welcome to find alternative shipping at your expense and risk."

A Decoder Monst-ROM from Germany

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via this Vemia listing

Click the auction link on top when you get there for additional listings.

"Great and rare modular synth made by Dmitry Morozov aka ::vtol:: during 2011 VolFram is semi-modular noise synthesizer and fx-proccesor based on digital 8-bit echo chip Ht-8970 it can be used as flexible delay/reverb processor, fuzz and complex. All these fx-capabilitys can be mixed and controlled with much flexibility Only 56 unit were made Dimitry is a transdisciplinary artist and researcher. He focuses on contemporary media arts including sound, robotics and installation, placing special emphasis on the link between emergent systems and new kinds of technological synthesis. Currently based in Ljubljana, Slovenia."

Yamaha TX802 SN OY0113 w/ PA Decoder Monst-ROM from Germany

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via this Vemia listing

Click the auction link on top when you get there for additional listings.

"Yamaha TX802 Private studio use only. Excellent condition. Complete with a PA Decoder Monst-ROM from Germany, working fine (after I remembered how to use it!)

VEMIA can collect and pack: 9GBP."

Abstrakt Instruments Avalon Analog Bassline Synthesizer

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via this listing

Additional Perfect Circuit listings

Home Bake Instruments Arps Box Arpeggio Sound Generator

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via this listing

Additional Perfect Circuit listings

Modal Electronics Argon8 Polyphonic Wavetable Synth w/ Original Box & Decksaver

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via this eBay listing

MINT Roland Juno-60 w/ Original Box

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via this eBay listing

This 12HP Module Might Be the Only Voice You Need


video upload by SynthDad

"The Ballista Blast is Shakmat Modular's hybrid digital/analog modular voice, squeezing a remarkably deep feature set into just 12HP. In this video, I walk through all three engines — Classic, Wavetable, and FM — and show you what this module is really capable of.

The Classic engine layers saw and square waves through two switchable analog VCFs (acid or bubbly, your call), a VCA, and an onboard distortion unit. The Wavetable engine runs a customisable wavetable set through that same analog chain, bridging digital texture with analog warmth. And the FM engine brings original multi-operator algorithms — up to four operators per patch — controlled via three macro knobs that keep complex FM territory surprisingly playable.

CORRECTION: The FM engine is actually a lot more complex than I describe in the video, and can do more than 2-op FM depending on the algorithm you choose.

Tying it all together: an onboard envelope, an assignable random generator, velocity and gate inputs, and nearly parameter-wide modulation assignment.

Timeline:
00:00 Introduction
00:50 Walk through of Ballista Blast
03:46 Pitch locking
04:31 Filter and Distortion modes
05:12 Built-in VCA
06:17 Wavetable oscillator
08:33 FM engine
09:52 Dubby FM chords example
10:55 Drone example
11:42 Modulation matrix
13:50 LFO mode on Expander
16:21 Randomising to change up sounds
18:59 Generate random patches for inspiration
21:01 Conclusions
21:45 Closing jam"

Classic 1980s Analog Synthesiser Sounds! // Soundforce Duophonic Eurorack Synth Voice


video upload by DivKid

"Recorded some time ago with a sound I love as much now as I did back then ... here's my duophonic (two voice) Eurorack modular synth voice made up of modules from SoundForce. I enjoy putting single manufacturer voices together out of modules to see what the accumulator sound and character is and with the SoundForce range inspired by the early 1980s Roland Juno synthesisers it was bound to sound great. I'm using one keyboard played voice working against a basic 7 step probability varying sequence."

*TIMING INDEX // CHAPTERS*

00:00 Intro

01:24 Voice 1

03:36 Voice 2

04:53 FX

07:24 Mod wheel 'GET BIGGER' macro
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