MATRIXSYNTH

Monday, May 04, 2026

Roland D-50 Digital Keyboard Synthesizer SN 816661

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Roland SH-101 Analog Keyboard Synthesizer (Gray)

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Sequential Circuits Pro One Analog Synthesizer (J-Wire Model) SN 5489

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Moog Rogue Analog Synthesizer SN 1505



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*NEW* Faderpunk — It Does MIDI Too!


video upload by Starsky Carr

"If you've been sleeping on the Faderpunk thinking it's just a fader bank, think again.

Most people see the Faderpunk from ATOV Projects and assume it's just another CV controller for Eurorack. It's not. This thing is a deep, flexible CV and MIDI controller — and after several months of hands-on use, I'm finally giving it a proper in-depth review.

In this video I dig into what makes the Faderpunk genuinely special: its app-based system. Rather than being locked into one function, you load different apps onto the hardware via an online configurator, effectively turning it into multiple different CV and MIDI modules in one compact unit.

I walk through a couple of the more complex apps: FP Grids (Mutable Instruments-style drum pattern generation), and the multi-channel sequencer.

You'll see it in action controlling the Roland CR-78 via MIDI CC (including live kick drum tuning for basslines), the Roland Galaxias for parameter and effects control, the Dreadbox Erebus via CV, the Dreadbox Nyx via MIDI, and the Vermoina DRM1 drum machine.

The sequencer alone — four independent tracks, each with variable step length, gate length, octave range, and rate — is something else. And with 16 save slots for recalling different setups, it's genuinely gig-ready."

MOD3 DC motor VCO | DIY eurorack modular synth Actuator Driver


video upload by HAGIWO

"MOD3 is an open-source, multi-purpose actuator driver.
I use MOD3 to drive an DC motor , it is controlled by V/oct PWM osc.
The vibration of the DC motor plays musical notes, and the piezoelectric element functions as a microphone.

working documents
https://note.com/solder_state/n/n160f...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod3-ge...

Please support me to continue projects.
In patreon you will find content about my background , technical information.
/ hagiwo

-------------------------------------------------------------
Repository of HAGIWO's DIY Modular Synth
https://note.com/solder_state/n/n54e0..."

Testing MPE in Eurorack (feat. Erea 2)


video upload by The Sound Convergence

"Some possibles patches for using MPE in Eurorack.
Do you think MPE is worth it for Eurorack setups?

0:00 Intro
0:40 What is MPE?
2:22 MPE for small Eurorack setups
3:23 Monophonic MPE Arps
4:35 MPE for medium monophonic Eurorack setups
6:15 Arp settings and unusual setups
7:17 Polyphonic Eurorack setups
10:47 MPE for CV control
13:06 MPE for drums
14:33 Pros and Cons of MPE in Eurorack"

Drummertime Tutorial - 1U eurorack drum sequencer


video upload by Tubbutec

"A short tutorial explaining basic as well as advanced Drummertime features.
https://tubbutec.de/drummertime/
Drummertime is a drum sequencer for eurorack in 1U and 1U/3U formats."

Publison Infernal Machine + LinnDrum / Jam 1


video upload by Valmont

"Have you ever wondered if a Linndrum could sound... Not like a Linndrum?! Here's a first jam featuring a fully restored one for a client, along with a Publison Infernal Machine reissue, hand-built by my friend Valentin, aka “Vintage Standards” :)

LINNDRUM - This one came with a fun issue: the snare would trigger the side stick, and the toms would trigger the congas. Apart from various CMOS quirks of that kind, I rebuilt all sliders/faders (volume + pan), the trigger buttons and replaced the pots with custom clones made by my friend Manfred from VintageSynth&Co. I also swapped the audio caps for polypropylene ones and rebuilt the power supply. During the process, the CPU card failed so I had to debug the sequencer - turned out to be a bad address latch and a dead bus gate (no idea what caused that). All in all, a serious overhaul!

INFERNAL MACHINE - A very special device. The IM90 was originally designed by French engineer Philippe Petitdemange between 1983 and 1984, with development continuing until the final DSP update in 1989. Publison devices are infamous for their opacity: components were often stripped of references, making repairs impossible. No schematics were ever published or even formally documented, which made the Infernal Machine both exceptionally rare and subject to extreme prices (I’ve seen one listed around 20k€!!!)
Following Philippe’s assassination in 2019, much of the design knowledge risked being lost. Jonathan Prager was designated as the official Publison legacy/maintenance technician and undertook the task of redrawing schematics based on the original archives he bought to preserve these machines. Meanwhile, Valentin, a French expatriate living in Japan, independently carried out his own reverse-engineering and successfully built a true 1:1 clone. His version (named the Celestial Machine) fits the strictest definition of a clone: an exact replica running the original code, featuring a beautifully recreated remote controller and using NOS components throughout ; except for a new OLED display (co-designed with Bob Grieb of TaunTek).
This special Publison-badged unit was sent to me for testing and demonstration to original Publison co-founder D. Dean - more info soon maybe :)

By the way! If you’re curious, I wrote my master’s thesis on Publison, it was published in French (deal with it lmao) : https://www.ens-louis-lumiere.fr/wp-c..."

Autocraft synthesizer 81 model CK-507 - what is it actually?


video upload by organfairy

"I test it with sound at 1:50

I bought this weird box many years ago, but I have never really found out what it is. I don't know why. It turned out to be an unpleasant noisemaker that is apparently build for use in cars. I don't know why anybody would want such a develish device, but on the other hand I don't understand the urge to have 'fuzzy dices' either.

The music is just me carbonaraing on my Elka X-1000 for little over 1½ minute."
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