Note: links to listings are affiliate links for which the site may be compensated.
via this Reverb listing
"A basic synth with a WILD vactrol acid filter. The "4 + >" button doesn't work very well when pressed in it's center but works fairly ok if you press down on the top edge of the button at an angle. All other buttons work fine, knobs are all good, Screen is crisp and bright & synth engine is fine. There are bubbles in the clear plastic body parts & a black scuff on the green face plate. No power cord included but it's a very common type of cord, easily obtainable."
Sunday, November 16, 2025
Atomosynth Medussa
See dealers on the right for pricing and availability on gear.
LABELS/MORE: Atomo Synth, Auctions, Reverb
LABELS/MORE: Atomo Synth, Auctions, Reverb
Vongon Replay Polyphonic Synthesizer
Note: links to listings are affiliate links for which the site may be compensated.
via this eBay listing
"Vongon Replay synth in excellent used condition. Please see all photos. The usb input is slightly angled within the chassis, but fully functional."
via this eBay listing
"Vongon Replay synth in excellent used condition. Please see all photos. The usb input is slightly angled within the chassis, but fully functional."
HALG-CD 4Mb Memory Card
Note: links to listings are affiliate links for which the site may be compensated.
via this eBay listing
"This card original circuit was fully developed by DoJoe - J. Fenkes and with the great community of keyboard lovers. HALG modified the mechanical, the circuit, and incorporated couple important changes:
✔ The 3 main slide switches that are on the back of the card are stronger now;
✔ The components placement are fully located inside of plastic cover to protect against ESD (electrostatic discharge)
✔ A card enclosure was designed to protect the card when you need to carry around
✔ A plastic case now fits perfectly to cover components and switches;
This memory card is a replacement for Roland’s M-128, M-256 and M-512 cards, as well as the electrically compatible Akai BR-16 and BR-32 cards. Compared to the original cards, this card has two advantages:
✔ It does not require a backup battery. It uses magnetoresistive RAM for storage rather than
regular static RAM, which is a type of RAM that can typically keep its data for twenty years
before it needs to be refreshed.
✔ A single card actually stores 16 M-128 / M-256 cards or 8 M-512 cards, which can be
accessed by a pair of convenient switch sliders at the rear end of the card.
✔ Like the original card, it also comes with a write protect switch.
via this eBay listing
"This card original circuit was fully developed by DoJoe - J. Fenkes and with the great community of keyboard lovers. HALG modified the mechanical, the circuit, and incorporated couple important changes:
✔ The 3 main slide switches that are on the back of the card are stronger now;
✔ The components placement are fully located inside of plastic cover to protect against ESD (electrostatic discharge)
✔ A card enclosure was designed to protect the card when you need to carry around
✔ A plastic case now fits perfectly to cover components and switches;
This memory card is a replacement for Roland’s M-128, M-256 and M-512 cards, as well as the electrically compatible Akai BR-16 and BR-32 cards. Compared to the original cards, this card has two advantages:
✔ It does not require a backup battery. It uses magnetoresistive RAM for storage rather than
regular static RAM, which is a type of RAM that can typically keep its data for twenty years
before it needs to be refreshed.
✔ A single card actually stores 16 M-128 / M-256 cards or 8 M-512 cards, which can be
accessed by a pair of convenient switch sliders at the rear end of the card.
✔ Like the original card, it also comes with a write protect switch.
Analogue Solutions Maximus 4V Polysynth | Analogue Workstation
video upload by Analogue Solutions
"Here's the Maximus 4V in action with a 4-part sequence, with each part brought in and out via the onboard stereo mixer (with independent pan controls). 4 onboard sequencers are being used in this mult-part sequence/song."
The Arcane Tower (Oxi One MkII, multipoly, opsix, wavestate)
video upload by Alec Sea
"The Arcane Tower was performed live using the Oxi One MkII sequencer, Korg modules, Roland TR-6S, and Fractal Audio, UAFX and Meris pedals."
See dealers on the right for pricing and availability on gear.
LABELS/MORE: Korg, Oxi Instruments, Roland
LABELS/MORE: Korg, Oxi Instruments, Roland
Scratching with Micro tape cassettes!
video upload by Beepboop Electronics
"My first go at scratching after finishing a prototype Scratch crossfader module with a uTape Scrubber and the prototype 3U modular tape deck."
Saturday, November 15, 2025
Schallwerk 200e: Okolytic Implant 23
video upload by verstaerker
"Ein Fragment aus der Zukunft des Körpers.
Metallische Pulse, biomechanische Rhythmen und fragmentierte Kontrollspannungen treffen auf kalte, klinische Präzision.
Dieses Implantat sendet keine Signale – es formt sie.
Ein audiovisueller Eingriff zwischen organischem Feedback und synthetischer Disziplin.
Erzeugt, moduliert und transformiert mit dem Buchla 200e System.
------------------------------------------------------------------
to listen more music by me please visit"
https://verstaerker.bandcamp.com
https://verstaerkerahead.bandcamp.com
Beetlecrab audio Tempera – granular synth
video upload by MPTY
"I’ve recently added the Tempera to my setup, and it already feels like the extra spark I didn’t know I was missing. Tempera is an hardware granular synthesizer"
See dealers on the right for pricing and availability on gear.
LABELS/MORE: Beetlecrab.audio, Elektron
LABELS/MORE: Beetlecrab.audio, Elektron
Röntgen & Cosmos
video upload by tilde~instruments
"The Cosmos is connected to the Röntgen insert. It is therefore positioned before the Röntgen delay. The Golden Reverberator is positioned at the end of the chain.
Headphones are recommended.
Röntgen is made to order.
If you are interested, you can find my email address in the link tree.
https://linktr.ee/tilde_instruments"
FLEA MARKET / FUSE / DIY - SYNTHI (with internal spring reverb) by Jacob Steel
video upload by jacobsteel
"DIY Synthi - piano stand test! #synthesizer #electronicmusic #synth #synthi #diysynthi #matrixsynth"
And a playlist in chronological order:
"Currently running the following:
Oscillators 1-4 - started out with the XR2206, schematic, pretty much from the data sheet. This part is the crazy chaos part. The XR2206 can be amplitude modulated as well as frequency modulated (here with a button) Oscillators 5-6 - Digital (this part will be CV volt-octave controlled) https://www.alldatasheet.com/datashee...
Envelope - 555-based envelope, similar to "the fastest envelope in the west" https://www.schmitzbits.de/adsr.html"
Playlist:
1. DIY SYNTHI first test all components
2. DIY Synthi longer demonstration….
3. DIY Synthi, stick demonstration
4. DIY Synthi - CV to Matrix test
5. Ölands Norra Udde - the Northern Head of Öland (DIY Synthi jam)
6. Alla världar som finns - (All Worlds That Exist) voice/lyrics Johan Holmlund
7. Synthi - Piano short improv
See dealers on the right for pricing and availability on gear.
LABELS/MORE: DIY, EMS, FLEA MARKET FUSE, Jacob Steel, New DIY, New Makers, News
LABELS/MORE: DIY, EMS, FLEA MARKET FUSE, Jacob Steel, New DIY, New Makers, News
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MATRIXSYNTH - EVERYTHING SYNTH
© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.
MATRIXSYNTH - EVERYTHING SYNTH









































