MATRIXSYNTH: Monday, March 28, 2016

Monday, March 28, 2016

First Demo of the Radikal Technologies RT-311 SWARM Oscillator Eurorack Module

RT-311 Swarm Oscillator & RT451 Dual Multimode Filter & Replika Delay

by Joerg Schaaf

"You are listening to the first demo of the RT-311 SWARM Oscillator."

You can find a pic of it previously posted here.

Rare Early Model 1968 Moog Model 950 Modular Keyboard Controller with "Hold / No Hold" Switch

Here is an interesting bit of Moog synth history in via Mike Metz of Thesis Audio Service.

"Attached are photos inside a VERY rare Moog 950 modular system keyboard controller that we are restoring for a client.

This 950 keyboard, made in 1968 was one of the first 950 series keyboards ever made. It has a 'Hold-No Hold' switch instead of the "Glide- No Glide" switch found on later models made after 1969. The circuit has two reed relays nside, rather than the usual one. The first relay closes at key down and produces the standard Moog 'S' trigger for the modular system. The second relay closes at key down also. This relay's contacts are routed thru the 'hold' switch and sent to the sample and hold circuit where they short out the hold capacitor when the switch is set to "No Hold". This way, when you press a key, the standard CV is sent out, but when you release a key, the CV drops to zero, rather than be held by the sample and hold circuit through the release time. This sends the pitch of the oscillator from audio to basically zero when the key is released, making it appear that the note disappears, or "No Hold". Actually, the oscillator will drop to it's lowest frequency, perhaps around 1HZ, so you might hear a little 'putt-putt' noise from the oscillator, but not the correct audio output.

The later 950 keyboards changed the rocker switch function to the more common "Glide- No Glide", yet both keyboard versions kept the same 950 model number. There was no mention of this early version 950 in any of the Moog documentation that I have ever found.

The other fascinating thing about this keyboard is seen in the photo of the bottom of the circuit board. There are hand made scribe marks on the boards around the hand-laid PC traces, probably put there during inspection during assembly. We can't be certain who made these marks on the PC board, but being from 1968....???"

The serial number for this one is 1008.

These aren't common. Only three with the "Hold/No Hold" switch have been featured on the site before, one in 2007, one in 2010, and one in 2011.

Roland MKS-80 with Roland MC64-C Cart

via this auction

Access Virus TI Desktop Synth

via this auction

Access Virus Indigo 2

via this auction

SR JV80 98 Experience II JV2080 Expansion

Published on Mar 28, 2016 zbr_audio

"Scrolling through presets from SR JV80 98 Experience II card inside JV2080, trying to jam something on each"

Easel Spring Rites

by bartonmusic aka Todd Barton

"a brief improvisation on the Buchla Music Easel . . ."

New Korg Volca FMs Available in the US

It looks like the KORG Volca FM has hit the states. Several units are currently available via this auction.

"Welcome to the Korg Volca FM, a three-voice polyphonic synthesizer that works in Poly, Mono or Unison modes. It also features octave and transpose controls, along with a velocity slider.

There's also a rotary control for scrolling through different algorithms - to control the interplay between the six operators - and a rotary for selecting presets. Plus, there's an onboard arpeggiator, with a huge selection of patterns and rates available, along with a Chorus effect with just a simple on/off control.

The Volca FM features a six-operator engine attached to a ribbon-style keyboard/step sequencer, the same as the ones found on the rest of the Volca range. A simple set of controls gives users control of the attack and decay lengths of the carrier and modulator signals, as well as LFO with depth and rate controls.

Just like the other Volcas, there's a variety of interesting performance features, which include the usual Pattern Chain, Active Step and Motion Sequencing. This allows users to record automation. With the FM, even the algorithm and arpeggiator settings can be automated, which is very unique and enables the creation of some super out there loops and synth lines.

Connectivity wise, the Volca FM features a MIDI in and the same simple sync ports found on the rest of the range. The FM can be loaded with sounds from the venerable DX-7 via SysEx. While the engine architecture of the FM isn't exactly the same as the DX-7's, it will still load the operator and algorithm settings, which should closely approximate the classic DX sounds.


3 voice polyphonic FM synthesizer
Poly, unison and mono modes
Octave transpose controls
6 operator engine
Ribbon style keyboard/step sequencer
Pattern chain
Motion Sequencing for automation
Algorithm and arpeggiator settings can be automated
MIDI in, simple sync in and out (the same as the rest of the Volca series)
Can be loaded with DX-7 sounds via Sysex"

Algorithm & Parameter Lists pictured below.

Roland SH101 Synthesizer w/ Extras

via this auction

"Syntaur slider kit was professionally installed. Comes with PSU, copy of manual, mod grip and strap hardware."

Sequential Circuits Instruments Pro One SN 3434

via this auction

"This Pro One is fully functional & in excellent cosmetic condition, J-wire keyboard. Recently tuned up / calibrated, plays very nice. Cleaned the J-wires, keys respond very well. No scratchy pots. Cosmetically, super nice clean shape on the front, overall quite clean."

SSSR Labs. KOTELNIKOV Commercial

Published on Mar 28, 2016 rpocc

"SSSR Labs KOTELNIKOV is a digital wavetable oscillator with built-in transient generator."

Malekko/Wiard Boogie Vactrol Ladder Filter + EML 101

Published on Mar 28, 2016 DavidH

"a little demo for this great filter ! here in 18db
sorry for my poor performance on the EML, I just need two hands for this beast, I realize I should fix the camera on my head :D
two Anti-oscillator feeds the Boogie, and Borg2 makes the vactrol gate, multistage manage the melody and the envelator up time, tame machine tames the melody.
Oh yeah, the beat comes from Peaks for the Kick, and Snare+Hihat is my wicked moded SR-88 and Shelves makes strange things on the drums."

Audulus 5U Module Preview

Published on Mar 28, 2016 Bimini Road

Get Audulus for: iOS | Mac | Windows/Linux

"This is a preview of some of the new modules and techniques that are coming in an update for Audulus 3. Lots of overdrive; plenty of modulation.

Sign up for the Audulus Newsletter and get the news and best new patches delivered right to your inbox:

Visit the Audulus Website for a Free Trial:"

Dave Smith Pro-2 sessions #7

Published on Mar 28, 2016 Boele Gerkes

"Dave Smith Instruments Pro-2 synthesizer + some FX pedals."

Yamaha Montage Sound Demos

Published on Mar 27, 2016 yamahacorporation

Wave Surfer
Far Away FM
Imperial Grand Piano for MONTAGE - Bösendorfer Piano
Uplight Mod 1
Kreuzberg Funk
Marine Life
Two Acoustics 2
Mellow Imperial for MONTAGE

Mordicus (Analog Four, Analog Rytm, MS-20 mini)

Published on Mar 28, 2016 Erwin Dorleijn

"Recorded live, featuring Elektron's Analog Four and Analog Rytm, and Korg's MS-20 mini."

[Battery Powered EP026] - Like Pixels In The Wind - Wrong Number

Published on Mar 28, 2016 Human Interface

"Complex waveforms like pixels in the wind... Today I tried out the new toy, namely the Teenage Engineering Po-16 which was quite fun. It is a strange little beast and makes you approach music creation in a different way than many other synths/ drum machines. Together with the classic sounds of the Boss DR220E I was able to get a nice little (though slightly sloppy) jam going with a pretty minimal setup.

Also, outside! For many of you on other regions of the planet this may not seem like anything special but way the f up here a nice day like this has been a long time in the waiting...

The Gear

Teenage Engineering PO-16
Boss DR220E
Korg Monotron
Korg Kaoss Pad Mini

Recorded via a ZoomH6"

ludoWic - recording Suiko ST-20 synth for KatanaZERO

Published on Mar 28, 2016 ludoWic music

"From the OST for the upcoming indiegame Katana ZER0 by Askiisoft.

Katana ZERO is a neo-noir action platformer with a focus on extremely tight, fast-paced, instant death combat.

Currently in development by Askiisoft.
More info at -

Music by: ludoWic"

Alesis Andromeda A6 Analog Synthesizer Synth SN A6003020800140

via this auction

The glow of the green LEDs makes me think a deep forest green accented A6 would look pretty nice.

"Does it all. In great condition, absolutely no issues with voices, filters, or VCA's. From what I've read this is from a good batch of these synths, if you'd like to research yourself the serial number is A6003020800140"

Alesis A6 Andromeda Analog Synthesizer with SKB Flight Case

via this auction

Oberheim OB-1 Analog Synthesizer SN 0536

via this auction

"The only problem is the OSC 1 Pulse setting doesn't work. There is one knob to choose between Saw on the left and Pulse on the right. No go on the right. It came this way when I bought it. Seller didn't disclose this fact, and I didn't make an issue of it (maybe should have). It doesn't really affect anything in the overall scheme of the sound design. With OSC 1 on Saw, you still get that analog Oberheim sound that's quite distinctive. I've always loved the big sound and versatility of the OB. I also have a Moog Voyager, so that will be handling alot of the sounds the OB can do, but of course, it's not an Oberheim."

Roland SH-101 with Original Gig Bag

via this auction

MFB Nanozwerg

via this auction

"Real Analogue VCO with CV/Gate + audio in."

"The analogue VCO generates 4 waveform shapes: triangle, saw tooth, rectangle and needle-impulse. The base pitch can be switched over a 4-octave-range, while fine-tune can be specified within a range of one octave. The sub-oscillator with 2 mixable octave settings completes the Nanozwerg's sound foundation. The noise generator can alternatively replace the sub-oscillator to create non-harmonic sounds. Finally, a glide-control can be used to tie notes with portamento.

The state-variable multimode-filter runs with 12 dB slope per octave and offers Lo-, Hi- and Bandpass-modes as well as notch-filtering and resonance up to self-oscillation. Cutoff can be modulated manually, by LFO and by the ADSR-envelope simultaneously. In addition, pitch-dependent cutoff-frequency can be achieved using the key follow function. Finally, LFO modulation can be replaced by the VCO output signal.

The LFO offers 4 waveform shapes including sample & hold as well as a one-shot-function, where the selected waveform is played only once after a gate-trigger, thus imitating a simple envelope. Besides the cutoff-frequency, the LFO can also modulate the pitch or the VCO rectangle's pulse width.

The ADSR-envelope allows modulation of the filter's cutoff-frequency and the VCA-output, with positive or negative excursion. Selectively, the VCA can also be opened by a gate-trigger to free the envelope for exclusive filter use.

For integration into a modular system or use with an analogue sequencer, NANOZWERG offers several control inputs. There is CV/Gate for pitch control and note length as well as CV-inputs for cutoff-control, the VCA and LFO speed. The LFO also offers CV-output.

The audio-input allows signals to be fed into the VCF and VCA. NANOZWERG can be controlled by MIDI from any compatible keyboard or DAW. Note commands are received as well as pitch-wheel (+/- 2 semitones) and modulation-wheel data, the latter controlling the filter's cutoff frequency."

Dreadbox Eurorack Module Demos

Published on Mar 28, 2016 Dreadbox


1. ALPHA module by Dreadbox

2 ADSR envelope generators with offset depth control, rate switch (fast-slow)
MIDI to CV gate and paraphony Convertor (with seperate Glide controls)
Modulation Wheel to CV Convertor
DIP switch for Midi Channel Select / Envelope retrigger / Unison-Paraphony

2. DELTA module by Dreadbox

Dual Digital Parallel Lo-Fi Delay
Wet output for both delays
Time modulation for both delays

3. Theta module by Dreadbox

Simple Dual LFO
Sample & Hold
White Noise Generator
Auto Gate generator (Clock with variable PW and Tap Tempo)

4. LAMDA module by Dreadbox

8-pole 48dB state variable filter
Dual Resonance frequencies
Filter types
– 2pole Low Pass (single resonance frequency)
– 4pole High Pass (single resonance frequency)
– 8pole Low Pass
– 8pole High Pass
– 8pole Band Pass
– 8pole Notch
OTA Drive Circuit
Filter can be pre-driven with high input levels

5. GAMMA module by Dreadbox

Synth Voice
Its Unique Oscillator is consisted of 6 sawtooth VCOs
It can produce from fat bass to space noise sounds
2-pole 12dB self-oscillating state variable filter
Dual VCA

6. omikron

2 oscillators with 4 waves each
Pulse Width modulation input
Audio interface
– Sub wave generator
– Audio to Gate generator
– Audio to Sync convertor
Audio can sync the VCO

Oberheim OB-Xa Analog Synthesizer "Short Trip"

Published on Mar 27, 2016 RetroSound

"(c) 2016 vintage synthesizer demo track by RetroSound

all pad and string sounds: Oberheim OB-Xa analog synthesizer (1981)
the melancholic and moody side of the OB"

2AM Experimental Ambient Session with the Radio Music Module

2AM Experimental Ambient Session with the Radio Music Module from Craig Anthony Perkins on Vimeo.

"This was just a quick, spur-of-the-moment test of my newly acquired, custom mirror-polished Radio Music module from Magpie Modular. I had just gotten home after an 8 hour day of work and a 3 and a half hour modular synth concert. I was tired... but inspired! Patch Notes: Radio Music into Mutable Instruments Elements, Braids into Rings then into Clouds. Make Noise Richter Wogglebug providing influence over Rings 'Dampening' and 'Position' and Clouds "Density" and 'Size'."

Plugging various sound generators into an Expert Sleepers Disting Mk3 Vocoder

Published on Mar 28, 2016 Henry Birdseye Jr.

"I just got this thing. The Mk3 (v3.3 firmware) has almost 50 functions, and I love the vocoder."

KORG volca fm preset sound

Published on Mar 28, 2016 VC FOX

"I will introduce the preset sound of volca fm."

KORG Volcas on eBay | KORG Volcas on Amazon

KORG volca fm and volca keys. The two are similar.

Published on Mar 28, 2016

"volca fm and volca keys are like twines."

Homemade synthesizer song #1

Published on Mar 28, 2016 organfairy

"I have had a number of requests to do actual music on my homemade synthesizers and sound gadgets instead of just an assembly video and a quick demo.

So, Gentlemen and the occational Lady, now I have done it!

I wrote the music AND build the instruments. If it should be more homemade I should have carved the keys out of wood myself or cast them in plastic (we have a 3D printer where I work so it could be done - but I have used keys from scrapped organs instead).

The rhythm comes from my XOR based drum synthesizer, the bass from the little polyphonic system with sequencer. Both are controlled by the telephone exchange step sequencer. The melody is played on a modular system with a waveshaper I made in 1995, The envelope generator was made in 1996 but has been modified a couple of times since (the first version was not very good because I didn't know much about synthesizers when I made it). The filter was made somewhere in the early 2000s and is light controlled by LEDs and LDRs. The keyboard is only a couple of years old. The solo is played on a simple synthesizer I made out of leftover parts in 1999. It is not completely in tune but that is one thing that has improved over the years: My newest instruments are more precise in tuning. The chords are from a little Oz-inspired mini organ that runs through a stereo phaser. Both are made in the early 2000s.

I hope you don't dislike it too much :-)"

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