MATRIXSYNTH: Thursday, June 11, 2020

Thursday, June 11, 2020

All Sequential kit - style 1984


All Sequential Circuits instruments, Italian '80s style:
Synth Lead: Prophet-5
Synth Bass: Pro-One
Drum machine: Drumtraks
Digital Reverb processor: MXR 01
Digital Delay processor: Lexicon PCM41

Eurorack, Line Level, Effects, Mixers - Connecting Everything Livestream Tutorial

Perfect Circuit

"We had to postpone this stream last week, but will be live Thursday 6/11/20 at 6PM PST, we will be going over how to connect eurorack and line level gear and the difference in their signal levels. Being able to go back and forth between signal levels gives you more options when it comes to effects routing and mixing. If you want to use a guitar effect pedal with your modular, or run a desktop synth through one of your eurorack effects we will go over this as well as the pros and cons of eurorack mixers vs desktop mixers and how to setup the routing of each.

Eurorack/Line Level Conversion Modules available here:"

Elka Drumstar 80

Kory Westerhold

"Just a brief sound demo for a Reverb listing.

The Elka Drumstar 80 is a thick sounding, punchy vintage machine from Elka that came out in the mid-80s. Known by many as the Italian Linndrum, it features 20 banks of different presets —with 3 fixed and 1 programmable variants for it a total of 80 presets. It’s also programmable, in the vein of an Oberheim DX or Linndrum. There are also intro, outro and fill patterns for each preset, as well as a programmable fill. Feature wise it has 8 individual outs and the main outs are mono OR stereo, as well as a mixing section at the top for individual sounds that takes them up and down in the main mix. It has a cartridge slot for RAM memory as well, though I don’t own a cartridge.

A couple quirks of note on the Drumstar 80. One is that it actually has an internal fan to help cool the machine, which can run quite loudly during operation. It doesn’t affect the sound output at all, but is kind of an odd trait of the machine. I left at bit of the room noise in at the beginning of the video during power up to give a sense of it, and cut in a bit at the end of this video that hopefully is a more accurate capture of the noise.

The second quirk (and this happens on the Drumstar 64 as well) is that the tempo/bpm doesn’t move up and down in linear increments. It may clock to midi fine, but it moves in fixed increments. Just something to note."

Elka Drumstar 64

Kory Westerhold

"Short demo of the vintage Italian drum machine, the Elka Drumstar 64 for Reverb. It’s just a preset box, but has killer, punchy disco-era rhythms presets...and gives you the ability to pan between different sounds. It’s actually a stereo machine, with individual L & R outs, but this was recorded in mono."

via this auction

"Here we have the Elka Drumstar 64, which is cool, punchy old Italian disco machine from the mid-80s. 1985 I believe 🕺🕺🕺"

New ElectroTechnique TSynth - DIY Teensy Synth


Note this is the first post to feature ElectroTechnique.

"TSynth is a DIY synth based on the Teensy 3.6 MCU board. It is six voice polyphonic with two oscillators and very comprehensive control and options. Patch saving and recall, three MIDI in options and USB digital audio. It is open source and the PCB and front panel are now available to buy on Tindie. The intention was that the cost of parts to build this synth are around $99 and it should be a serious instrument. There are many features and full details are on

All sounds are directly from TSynth with built-in stereo chorus - Youtube tends to muffle the sound, the bass will go very low. I'm hoping that end users will produce better demos and contribute to the code."

Specs via ElectroTechnique:


Six voice polyphony (last note priority), two oscillators per voice, detunable with +/- 2 octaves range, Sine/ Sample & Hold (like tuned noise)/ Square/ Sawtooth/ Ramp/ PWM/ Var Triangle/ User waveforms and level
Pulse Width/ Var Triangle can be set for each oscillator with PWM by dedicated LFO or from the filter envelope
Pink or white noise level
Dedicated LFO for pitch mod (can be retriggered by note on), Sine/ Triangle/ Sawtooth/ Ramp/ Square/ S&H waveforms
Pitch can be modulated by filter envelope (+/-)
XOR ‘Ring Mod’ (creates lots of harmonics with certain waveforms)
Unison with all twelve oscillators detunable from each other
Polyphonic Glide with variable time

State variable 12dB filter (SVF) with continuous mix between LP and HP (provides notch filter) and BP
Cutoff freq and resonance

Cutoff can be modulated by dedicated ADSR envelope (+/-), dedicated LFO
LFO has same waveforms as pitch LFO (can be retriggered by note on) and rate can be set to match MIDI clock (tempo) with variable time division (1,3/4,1/2,1/4,1/8…)

Dedicated ADSR envelope
Volume for DAC output
Effect amount and mix - currently for stereo ensemble chorus rate and mix but could be set up to allow choices in programmer

160x80 IPS colour display
Encoder with button for data entry, Back button for menu navigation
Save and Recall buttons for storing patches, holding Recall initialises the current patch to match the panel controls. Holding the Save button takes you into a patch deletion page.
The programmer makes the synth very flexible with future possibilities for changing User waveforms, alternative filters, alternative effects with further parameter settings.

New MFB-501 PRO

MFB-501 Pro flies in the air - HerrFricke Junior

via MFB

"The MFB-501 Pro drum computer is a modernized new edition of the MFB-501 from 1980. It offers eight analog drum sounds, each of which can be edited in three parameters. As an extension, the model MFB-501 Pro has eight slots for samples, as they were already found in the MFB-KULT. There is a selection of 128 samples of various drum classics in the internal ROM memory. You can import your own samples with a length of up to 1.5 seconds each from a computer via USB.

Patterns with up to 16 steps and A / B division can be programmed in the sequencer, from which songs can be put together. The sound parameters of all analog instruments can be varied with each step (parameter locks). The sequencer has a five-stage shuffle mode and can be synchronized to the MIDI clock or an external analog clock.
The MFB-501 Pro can also be used as a sound module, where all instruments can be triggered dynamically via MIDI and the sound parameters can be controlled via MIDI control change commands.

A stereo output, a controllable headphone output and a sync socket are available as connections. Power is supplied via the supplied USB plug-in power supply. Updates can be made from a computer via USB.

The parameters of the individual instruments:
Bass drum tune, decay, attack, volume
Snare tune, decay, noise, volume
Claps decay, attack, volume
Tom Tune, Decay, Attack, Volume
Bongo Tune, Decay, Attack, Volume
Clave tune, decay, attack, volume
Cymbal Tune, Decay, Mix Noise / Metal, Volume
Hi Tune, Decay, Mix Noise / Metal, Volume
Sample 1 to 8 tune, decay, volume"

FORMANTA UDS.test after repair .

Alexey Taber

Formanta UDS on eBay | on Reverb

Subharmonicon | Moog Demo Library

Moog Music Inc

Subharmonicon | Pitch Sequencer
Subharmonicon | Polyrhythm Sequencer
Subharmonicon | Using Subharmonicon with Mother-32 & DFAM
Subharmonicon | How to Sync Using MIDI
Subharmonicon | How to Sync Using Analog Clock
Subharmonicon | Patch Tips & Expanded Functionality

Summer Night Chillout Ambient (KORG Minilogue)


"Hey! Hope you're doing okey! Here's a little ambient jam on the minilogue over a pad I made. I used Valhalla Supermassive on the Minilogue, it's free and awesome:"

Divkid's RND STEP overview and demo at Patchwerks!

Patchwerks Seattle

"RND STEP is a high performance, 3 channel sample and hold module, comprising of 6 unique sample and hold circuits in just 4HP.

Each channel features two internal analogue pink noise generators, and two sample and hold circuits split across unipolar and bipolar outputs.The unipolar output always samples its own noise source for a stepped random voltage between 0-5V. The bipolar output by default samples it’s own noise source (for -5V to +5V stepped random). However, you can override that connection with the sample input. This allows for sampling external audio or CV signals, and it can sample voltages anywhere between -10V and +10V with the sample input.

RND STEP will operate at slow trigger rates with highly extended hold times, ensuring it holds the voltage with minimal droop, but it will also operate up through audio rates for destructive downsampling FX for audio. When triggered at audio rates RND STEP outputs downsampled and clocked noise tones from the internal pink noise generators. These can then be used for modulation, percussion or sound FX.

Trigger input 1 will normalize across all 3 channels, meaning a single trigger can give 6 unique random voltages, of which 3 are bipolar and 3 are unipolar. The combination of both ensures you have the right voltages in the correct ranges for the sources you wish to modulate.

Order here:

Demo by: Matthew Piecora (aka EZBOT)"

E-MU EMULATOR II Sampling Synthesizer (1984) The Liquid Stack Sound

"(c)2007-20 by RetroSound
supported by UVI:

Many people asked me over ther years for the famous Liquid Stack Sound.
The Sound is from the EII OMI disk Expansive Synth Stack and he is a part of 4 sounds (Liquid Stack 1-4)
I think the sound is sampled by the NED Synclavier. The DX7 Sound 'Stratotron' is very similar too.

RetroSound synthesizer demo videos since january 2007.
All is for free. If you like my work, so can you support me with a donation or a purchase of my music albums. Thank you!


RetroSound home:"

„Being Boiled“ by The Human League played live on Korg Volcas (FM & Keys), Walkie Talkie & tek.drum


Great intro and follow-through. Spotted this one on discchord.

"The Sponge Bob Walkie Talkies of my nephew inspired me...
Gear: Korg Volca FM, Korg Volca Keys, Patchblocks tek.drum, Sponge Bob Walkie Talkies (mic running thru Vox Valvetronix Guitar amp, not visible), Korg Kaosspad mini S2 (not visible, as Aux Send/Return for the mixer), KVGear Vixen Mixer.
Audio recorded with Tascam DR-05.
Video recorded with Casio Exilim and Ricoh WG-M1, edited with Perfect Video and Videoleap (iPad).
Thanks a lot for watching!"


zack dagoba

"A Serge Paperface sketch. In a mirror fashion.."

Be sure to see zack dagoba's aka Benge's THIRTEEN SYSTEMS posted here.

Plaits Synthesis Models Series #11 - Particle Noise

Omri Cohen

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

I also created a document full of patching techniques and ideas that I will continue updating -

Here is the patch -
Plaits Manual -"

Orgon drone 16

The special sauce

"a self generating drone patch on the ordon systems modular synthesizer.
audio impressions=sad birds and lonely frogs"

You can find more in this post.

Orla DSE 12

via this auction

"The Orla (originally Bohm) DSE 12 provides 12 notes of Yamaha YM2203 FM synthesis with full editability from the panel for all 4 operators, multitimbrality per MIDI channel, nice analogue BBD chorus, & patch load/save by MIDI/tape! This is a great and rare way to edit classic 4-op FM sounds."

Korg Mono/Poly SN 470451

via this auction

"Original vintage Japanese (non-export) 100v Korg mono/ poly in excellent playing condition. Freshly checked over by the tech, and working perfectly, no issues. The MP-4 is one of my all time desert island synths, a bit of a 4 oscillator Moog minimoog in unison mode, with ms20 flavoring, a bit Jupiter 4 in poly, and really its own thing in the best way possible. It’s absolutely loaded with features and tonal options, but the cross modulation is where it’s at. You can make the craziest sounds on this thing, very modular sounding, crashing space ships, quasar queefs, spliokledy blee-blops. Grrrr."

Sequential Circuits Six-Trak Polyphonic Synthesizer SN 0985

via this auction, also on Reverb

"Just serviced by Greg Montalbano of Analog Synth Service in Oakland CA 2 months ago. Well known SCI tech. Here’s what has been done:
Replaced bypass caps, battery; cleaned pots, switches, key contacts;
replaced key; reloaded factory data.

Fully functional! Some cosmetic flaws: one small chip on one key, some chips on the wood side panels, some marks/scratches mostly on the bottoms panel, side screws are not all the same. Check photos as it also described the physical condition of the unit"

RUCCI 8-Bit Power Synthesizer

via this auction

You can find demos and details on the RUCCI 8-Bit Power Synthesizer back in 2016 here.

MFOS Drone Box WSG/01 Music From Outer Space analog CV


via this auction

"The best KIT to get organic analog, bit-scapes, the Units can be used together or individually.
The WSG is a powerful drone generator taking full advantage of the 6 oscillators and 3 cross-modulated square waves, the ECHO Rockit is a extremely well built analog FX unit that can also self modulate for a unique sound design

You will also get 3 cables, 1m mono big jack cable for connecting the two units together, and 2 small 50cm patches for auto or cross modulation between the units

NOTE: the units have 220w/EU plugs power supply"

ReBach GR-11 VCO Experimental filter modulations


"In this short demo two GR-11 VCO with one GR-21 VCF for Experimental modulation sounds.

First VCO SAW output connected to the input of the VCF. The second VCO SUB out is connected to the VCF CV input. Both VCOs receive the same 1v / oct signal. The modulation of the filter is now controlled via the four SUB level buttons"

ReBach GR-11 VCO

VA Pads for Waldorf Quantum

Tim Shoebridge

"VA Pads is a combined sample and preset library for uploading to a Waldorf Quantum synthesiser. The samples are stereo recordings from virtual analogue hardware synths dating back 20 years. For more information and to purchase this library, please click on the following link:"

digitone (1.20 probability) / arp 2600 (doepfer dark time)

studio snippets

"general muck around to test out probability on digitone k"

Shakmat Tessitura Tailor — Demo


"The Tessitura Tailor adds or substracts a precise voltage (from -2 to +2 volts) to the signal received at the CV input. This signal is transposed by octaves, depending on the rotary switch’s position. As the CV input is normalised to 0 volt, the module works without any input as an octave switch."

NEW DIVKID MODULE // 'RND STEP' with Steady State Fate // 6 High performance Sample & Holds!


"Here we have the new (third) DivKid Eurorack module made in collaboration with Steady State Fate. RND STEP is 6 high performance analogue sample and holds split across 3 channels in 4HP. There's 6 analogue pink noise generators, unipolar and bipolar outputs, high accuracy sampling, long hold time, trigger normalisation for lots of stepped modulation from single triggers, audio rate performance for downsampling and modulated noise tones. I'll leave the video to do the talking and as always I hope the video provides you with lots of ideas to apply to your own systems too.


00:00 Intro & video previews

01:13 RND STEP, accuracy performance testing & Patreon bonus patch book

02:28 Feature run down

03:53 Quad peak animation

04:38 Generating random gates

05:38 Humanising voices & patches

06:34 Sampling modulation for new patterns and melodies

09:07 Generating downsampled “clocked” noise colours

10:01 Noise percussion

10:23 Creating overlapping chord tones sampling 1v/oct pitch

13:17 Musical pitch tracked downsampling

14:27 Downsampling drum breaks

14:35 Downsampling lo fi voice samples

14:45 Auto chordal composition - using random voltages for polyphonic pitch and levels

15:43 Random Panning & Accents + sampling other noise sources for different random voltage distributions

16:05 A bit of everything for good measure!"

Patch n Tweak

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