MATRIXSYNTH: Sunday, October 20, 2019

Sunday, October 20, 2019

HT8950 "robot voice" Eurorack Module Build

Published on Oct 20, 2019 Reckless Experimentation Audio LLC

"I take a Holtek HT8950 voice modulation chip and turn it into a Eurorack module. I found the best spot in your signal path for this module is between the VCO and the VCA, acting as an 'overdrive' effect."

Reverselandfill Apple Tree Noise & Drone Synth

via this auction

"This is a fully build handmade drone / noise synthesizer.

The case is made of a solid block mahogany hardwood. The case is hollowed out with a router tool to fit the electronics.
The "appletree" picture is laser-engraved.
The wood is finished with tung oil & clear laquer.
Potmeters are all 16mm Alpha's, knobs are red plastic.
On the back the case is closed off with a metal plate. It has rubber / soft feet.


Section 1: (Drone)
Dual triangle oscillators are hard-switched through an analog switch by a fast squarewave clock.
Then the signal goes into a lowpass filter.
Sounds vary from deep rumbling drones to phasing screaming lead sounds.

You have control over the two pitches of the main oscillators, the clock frequency and the filter cutoff.

Section 2: (Noise)
4 squarewave oscillators that modulate each others frequency,
go through a clock divider and are mixed together.

You have control over the four pitches of the oscillators.

Section 3: (patchbay)
There are 24 patchpoints.
9 of these are touch based (also patchable by 4mm banana jacks), the other 15 points are 2mm banana sockets.
Drone section patchpoints: OSC1, OSC2, Clock
Noise section patchpoints: 12 clockdivisions, noise1, noise2, mix1, mix2, mix3

2x 6.3mm jack output.

Power: 9v/12v bus for adapter (outer ring is GND, center pin is +V)
Note: Power Adapter not included.

24x19x6 cm"

Tasty Chips GR-1 Granular Synthesizer SN 0001

via this auction

"Tasty Chips GR-1 Granular Synthesizer in excellent condition. I was the first backer on Kickstarter to back this unit. This is serial #0001 of the worlds first hardware granular synthesizer. Nothing is wrong with it, it’s brought me so much joy that I’m looking to pass it on to someone else who’ll love it just as much as I did."

Shredding on Stylophone GEN R-8

Published on Oct 20, 2019 Stylophone

"You can play fast guitar-style licks and slides with bends and divebombs on the touch keyboard. Here's a video we made earlier in the workshop."

E300 Ultra VCO - Overview and Demo

Published on Oct 20, 2019 SamiRabia
Update: Re-Published on Oct 27, 2019 SamiRabia

Synthech E300

Roland TB-303 Bassline Synthesizer

via this auction

Moog PolyMoog Poly Analog Synthesizer Vintage Model 203A SN 1355

via this auction

"Recently purchased from a musicians estate sale. Synthesizer has only been tested through a small practice amp and has not been checked out by a professional technician. Synth makes a variety of sounds. A 1/2" plastic piece has broken off the back bottom corner of case. The 4 adjustable feet on bottom are good. Buttons and switches all there and the lights work. Synth does not come with a carry case or a foot pedal controller."

E&MM Spectrum Synthesiser Preview

Published on Oct 20, 2019 Reuben Jones

"The E&MM Spectrum is a British DIY synthesizer designed by Chris jordan and released with Electronics and Music Maker magazine in 1981.....

The magazine provided a painted metal faceplate, keyboard assembly, and printed circuits boards. The rest was sourced by the builder using a supply kit provided by the now defunct Maplin Electronic Ltd, UK (see also the Maplin/ETI 3600, 3800, 4600, and 5600S synthesizers).

The synthesizer uses the famed Curtis integrated circuits: VCOs (CEM 3340), VCF (CEM 3320), VCA (CEM 3330), and envelopes (CEM 3310). These chips were used by many companies at the time, including AKAI, ELKA, Ensoniq, Oberheim, Roland, and Sequential Circuits.

Perhaps the closest synthesizer to the Spectrum is the Sequential Circuits Pro~One, both of which use the same CEM chips for VCOs, filter, and envelope; and use a similar two-VCO architecture. However, whilst the Pro~One is known for an extensive modulation section, the Spectrum is very interesting in its own right.

The design makes the most of the CEM 3340 VCOs, with a total of five waveforms, including a SUB square wave. The LFO, with multiple waveforms including random and regular sample and hold (the latter of which produces more defined sequencer like voltages), can be routed in positive or negative polarity to the VCOs, filter, ringmod/noise, and output. The multimode LP, LBP and BP filter is a self oscillating one and can be modulated by the joystick, envelope generator, and the LFO. There are also two sync options, as well as FM, ring mod, and an envelope shaper. The stereo output can also be modulated for panning and stereo FX; and there are eight jacks for external connectivity including CV/Gate in and out, and pre filter in.

In conclusion, I would describe the Spectrum as a drunk and wonky Pro~One. Mine is temperamental, and sometimes has a mind of its own, but when tamed, the Spectrum becomes a very live and organic synthesizer. The tech who serviced it for me said it reminded him of an ARP 2600, and described it as a 'proper synth'. describe it as "...a mixture of EMS Synthi, Sequential Pro-One and Roland SH-5" and "one of the most outstanding monophonic analog synthesizers in history".

This audio was recorded directly from the Spectrum in mono, using a TC Electronic Alter Ego delay pedal for some parts. All parts played from the keyboard, or using the LFO to gate the amplifier."

'Analog Ambient' Performance 2 - AJH Synth MiniMod Eurorack Modular

Published on Oct 20, 2019 DreamsOfWires

"All-analogue 2-voice synth performance/improvisation, part 2 of a series of work-in-progress recordings for a future album/release. No overdubs, just 2 patches/parts played simultaneously. Turn on subtitles for a rundown on what's happening. See the previous composition/performance here: [posted here]

The AJH Synth 'Mini Mod' Eururack modular system is like the Moog Modular I could never afford, only better, as it benefits from modern design features, is a fraction of the price, and a fraction of the size. It produces those rich, warm, characterful tones of the 70's I always wanted, and so much more.

Recorded on an iPad using AUM, with EOS2 reverb.

See my music/albums/releases here:
Support my channel on Patreon:"

CRUMAR BIT99 (1985)

Published on Oct 20, 2019 Synthesizer Home

Moog One,TTSH ARP 2600,Prophet X,Octatrack , Analog 4 and Euros.

Published on Oct 20, 2019 therudyrude

"In this improv I decided to NOT use any common clock and let them run free!I used a Todd Barton trick on the ERBEVERB cv control of Size with a square wave. It makes a very metallic percussion sound."

Analogue Systems French Connection

Published on Oct 20, 2019 Joseph McGinty

"Short demo of the Analogue Systems French Connection controlling an ARP 2600.
Currently on sale at"

SN 224 via this auction

"Wonderful Analogue Systems French Connection controller, inspired by the Ondes Martenot. Incredibly expressive and interfaces well with modular synths. Used very sparingly in my smoke free studio."

Robaux SWT 16+ Build & Demo Videos

Published on Oct 20, 2019 Synth Diy Guy

"Building this super fun trigger sequencer by Robaux!"


SWT 16+ demo

Published on Oct 20, 2019 Synth Diy Guy

"Taking my freshly built Robaux SWT16+ trigger sequencer for a spin :)"

zlob diode chaos

Published on Oct 20, 2019 Todd Barton

"a little exploration of the new Diode Chaos from also checkout his instagram
and of course please consider supporting my continuing videos at"

5 Patchlets with Freak from Vult

Published on Oct 20, 2019 Omri Cohen

"Five little patches I've recorded with the hardware version of Freak from Vult, a stereo multi-mode digital filter. There is no processing what so ever to the sound, no compression, EQ, distortion, or whatnot. The only thing added is a limiter to keep the levels from clipping.

If you like what I do and want to support my work, consider joining my crew on Patreon -"

GenoQs Octopus sequencer – special NC edition #1

via this auction

"GenoQs Octopus – Unique MIDI sequencer concept. This is a special showcase unit at serial number #NC001.

The GenoQs Co. was dissolved some years ago, thus the Octopus & Nemo aren't in production anymore. Nevertheless, the former owners appear to provide continued support, such as repairs & OS updates.
Royal version of the GenoQs sequencer line, absolutely unique production number for Octopus 'NC' model: #NC001
Endlessly deep capabilities, yet once you've read the manual it's very intuitive.
Metal front & back panels have a smooth matt cream white varnish. Piano lacquer-treated black wooden framework. 2x MIDI in/out. 2 USB ports for updates & lamp. Engraved serial. 110-220V switchable internal power supply.
Exceptional condition. Technically perfect. Pristine front panel.
Original box."

Cwejman BLD-2 Bass Lead Drum Eggshell

via this auction

Black Corporation Kimji SN 1278

via this auction

"Folks this is a really cool piece. I took this in recently as part of a large gear swap. There was a lot of buzz last year about this synth called Kimji by Black Corporation of Japan. I believe they may have only made 10 or so of these as part of a very limited initial run. This is serial number 1278. It includes the original box. There is no physical manual but there is one accessible online. The unit is in mint condition and the pictures are of the actual unit you will unbox.
The Black Corporation Kijimi is a faithful recreation of the very rare and highly sought after French wonder-synth the RSF Polykobol. Originally released in 1979 the PolyKobol MK1 was restricted to only 30 units worldwide and is considered to be one of those most significant synths developed in this era.

Kijimi is an 8 voice polyphonic synthesizer with two continuously variable oscillators per voice, an incredible modulation section, MPE compatibility, preset storage and recall and build quality that is enviable to say the very least.

Kijimi’s inspiration, the Polykobol was a synth that was very much ahead of its time, providing a wealth of unique features and tone shaping options that even to this day stand out, such as the continuously variable wave shaping, open and easily assignable modulation section with 5 sources and multiple destinations and a rich, interesting filter tone.

Owning an original RSF Polykobol is, even for the most diehard collector almost impossible. Just like with their Deckards Dream CS-80 inspired powerhouse, Black Corporation have again made one of the most inaccessible synths, accessible for everyone.

Kijimi is another standout synthesizer from Black Corporation, delivering the sound quality, aesthetics and workflow of a Polykobol with all the mod cons you’d expect from a modern machine.

The main features of the Black Corporation Kijimi include

8 voice polyphonic analogue synthesizer
Inspired by the legendary RSF Polykobol
CRN3340 based VCO’s
SSM2040 based vilter
Polyphonic aftertouch
MPE compatible"

Hikari 2.0 Pocket Synthesizer

via this auction

See this post for a demo.

"Shape sound with the world around you. Master your instrument, master Hikari ! The newest iteration in personal pocket synthesis! Two knobs to control volume & pitch, as well as a photocell to sense light (plays like a theremin) and a momentary button to engage. Each Hikari 2.0 is handmade in Philadelphia, PA - runs off a 9v battery with a built in 8ohm speaker. Also has a headphone jack for wandering about & line out recording."

Zoom Sequencer Rhythm Machine 5317

via this auction

This one almost deserves the Synth Rorschach label. Reminds me of a Buchla 700 meets Behringer mixer.


via this auction

Analog Drum Machine
Copy of the BOSS DR-55
w/ 4 fresh AA batteries installed
Excellent Sound

VINTAGE TAMA DS200 drum synthesizer

via this auction

Erica Synths e-licktronic NAVA Extra9 Case

via this auction

"Limited run of e-licktronic NAVA Extra9 full aluminum cases from Erica Synths!
Cases come with pe-installed spacers, so the front the panel is free from screws, LCD filter and you do not need any additional hardware to mount a PCB inside the case. Special bonus from us – ON/OFF switch included!

More information on the NAVA project here."

Vangelis - "the bounty"**graal7 cover+**

Published on Oct 20, 2019 graal7

Vangelis cover 'the bounty' play on juno 6
korg kronos

Crow: First (Monome Crow + Mannequins)

Published on Oct 20, 2019 S. B. Arweiler

"First flight with Monome Crow. This is Crow's 'first' sequencer, sequencing Mannequins Mangrove and a self oscillating Three Sisters. Just Friends is only used as a clock source in this patch. Everything goes through Bastl Thyme. EHX Catehdral adds reverb in the mixer's."

via monome

"crow speaks and listens and remembers bits of text. A scriptable USB-CV-ii machine.

crow connects to norns and computers running Max, Max for Live, and other serial-enabled applications. We’ve created various norns scripts and Max for Live devices which require no programming, and we’ve also created tutorials and studies to get you started quickly programming your own ideas into this tiny, powerful module.

crow also stores a complete script, so that without a USB connection it can continue to run, responding to CV input and ii messages.

A collaboration by Whimsical Raps and monome.


Eurorack, 2hp width, 41mm depth
Power consumption: 60mA @ +12v, -15mA @ -12V, no 5V
2 input, 4 output, 16bit [-5V,10V] range
Rear panel digital communication bus (ii)
full Lua scripting environment"

Frap Tools USTA: Review, tutorial and setup walkthrough

Published on Oct 20, 2019 loopop

0:00 Intro
0:50 Overview
3:40 Setup walkthru
5:00 Project structure
6:10 Stage params
7:30 CV channels
8:40 CV stage types
9:05 Gate stage types
10:10 Variations
10:35 Gate layers
11:10 CV layers
12:10 Short cuts
13:10 Main screen
14:05 Stage loops
15:20 Song mode
16:45 Composition
18:05 Misc features
20:10 Pros & cons

Frap Tools USTA

octatrack / perfourmer

Published on Oct 20, 2019 ljs8888

warmth | Digitone + Analog Heat MK2 Dark Ambient

Published on Oct 20, 2019 Blicero

"warmth by Blicero

I recently sold a lot of stuff to downsize my set-up and in doing so acquired an Elektron Analog Heat MK 2. Which is far and away the most musical and wonderful distortion/Drive I’ve worked with. I really like on certain settings that you can sit at the precipice of a destructive effect without going to far in.

This piece was made on the Digitone straight into the analog heat. A little darker in tone than previous stuff; I’d expect a little more of this kind of thing moving forward. It’s inspired by my days of post-rock and shoegaze guitar playing.

Recorded onto a Zoom H6 and lightly processed in Ableton."

Moog Source + Volca Sample

Published on Oct 19, 2019 marsupialmicron

"Jamming with moog source and volca sample sequenced by a beatstep pro. The track is called 'to know your flesh' and it contains a sample from the movie 'Hellraiser', hope you like it."

Modal Electronics 008

via this auction


via this auction


via this auction

ARP Omni 2 SN 1144

via this auction

"This is an ARP Omni 2, Model 2473, fully overhauled by Synthcave Sound. It's fully functional and sounding great! The legendary Omni 2 is perhaps most closely associated with Joy Division but was used extensively in numerous recordings in the late 70s and early 80s. Its lush Solina string-ensemble sound is much sought after, but the Omni 2 also features a polyphonic synthesizer with VCF, LFO, and ADSR envelope along with a separate bass-synth section with its own envelope. Comes with a power cord.

The just-finished restoration consisted of 40+ hours of work:
- All 15 sliders were replaced with brand-new, modern, LED-illuminated sliders; these are super-smooth and look fantastic!
- All tantalum and electrolytic capacitors in the power supply have been replaced with brand-new, high-quality, high-voltage electrolytic capacitors - additionally, the recommended power-supply mod as described in ARP's field change notice FCN0011 (addition of a pair of capacitors and a pair of zener diodes) has been performed
- New key bushings on all keys, buss bar cleaned, and the keybed leveled
- All tantalum capacitors throughout the synth have been replaced with new high-quality electrolytics
- The 4075 VCF module has been modded for improved cutoff range
- Fully calibrated to factory spec with oscilloscope and frequency counter

Cosmetically, the synth is in quite good shape, considering its age. The top is a little scuffed up, as is quite common for the Omni 2, as people tend to like to set things on them that they probably shouldn't due to the flat surface. But, overall, it looks great, particularly with the new illuminated sliders!"

Frostwave spaceBeam Spatial Sensing Oscillator

via this auction


Patch n Tweak

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