MATRIXSYNTH

Retroaktiv Rhodes Chroma Polyphonic Aftertouch Demo

Note: Auction links are affiliate links for which the site may be compensated.
video upload by Retroaktiv Synthesizers

"Playing a Rhodes Chroma with the Retroaktiv Polyphonic Aftertouch Retrofit installed. For more info, visit www.retroaktivsynthesizers.com"

Found the above video from 2017 in the following listing.

via this listing

"It is in great shape, and the wood is nearly flawless. The metal and tolex are also in great shape. It's got the CC+ CPU board upgrade, MIDI and polyphponic aftertouch. The unit has had the following work done:

Luca Sasdelli Switching Power Supply installed. (Replaces original PSU, which was underpowered)

Retroaktiv Polyphonic Aftertouch installed. Can also transmit this via MIDI to control other devices that support poly aftertouch.

CC+ CPU upgrade installed, allowing for CC control of parameters, extra memory, and more.

Other information:

One of the segments is out on the large 2-digit segment display (Which shows the current program selected). One segment is out on the 8-character mini-7-segment screen. Both of these segments are so minor that I have never been affected by them. One of the voice cards is currently coming up with an error. I am willing to replace the card before shipping the instrument. If I haven't played the Chroma for a month, certain keys will need to be exercised a few times in order to work. This is due to the leaf switches used on these. They're the same as the ones on the K250. I have never seen a keyboard that uses these that did not exhibit this behavior.

There is s small dent in the front panel near the Chroma logo. Hardly noticeable.

Voice 6 is currently throwing an error code."

CLICK FOR MORE »

Portabellabz/SaModular 208p Buchla Music Easel Clone

Note: Auction links are affiliate links for which the site may be compensated.
video upload by no talking

"music easel - first patch

208p w/ Portabellabz ToolBox"

via this listing

"Hand-Built Buchla Easel by Constantin (Portabellabz)

This setup was meticulously hand-built by Constantin at Portabellabz, with all components in perfect working order.

Price: $8,000 USD (equal to my original investment). I’m open to reasonable offers.
Location: Portland, OR. Local transactions are preferred, but I’m willing to ship if necessary.

Feel free to ask any questions—I’ll do my best to provide detailed answers.

Modifications and Features

208p Module (with Blue PCBs)

Flat red LEDs
Tinijax connectors
1.2V/oct input
On-off-on switch for CO CV
Reverb mix CV input (replacing the rightmost pressure socket with a black banana socket)
Dedicated LPG outputs (replacing panel signal out tinijax sockets)
Infinite sustain functionality
Noise generator (similar to the 208c; accessible via LPG2 when the routing switch is in the top position and the preamp is unpatched)
Enclosure Features

SAmodular 2x4U enclosure
Dual 1/4" audio output jacks
Gate minijack input with Buchla pulse generator
1V/oct CV minijack input
Additional Components

Portabellabz ToolBox: Includes slew limiter
Roland Klinkenberg Sequencer Aux Expander: Includes Mod Expander
Custom Hard Case: Custom made by Road Cases USA
Rare SAmodular Keyboard and Case

The 218 keyboard and case are from SAmodular, with specific modifications by Constantin to ensure peak functionality. Note that the keyboard is no longer in production, making this setup particularly unique and valuable.

This is a beautifully customized Buchla Easel, built and modified by one of the most respected names in the field. Don't miss this opportunity to own a one-of-a-kind instrument."

CLICK FOR MORE »

ASM Hydrasynth Deluxe Silver Limited Anniversary

Note: Auction links are affiliate links for which the site may be compensated.

via this listing

"Selling a Hydrasynth Deluxe in the beautiful limited edition sparkling silver finish.

Comes with all contents including shelf, power supply, limited edition silvers, and signed serial card. Plastic still on the multiscreen as seen on last picture."

CLICK FOR MORE »

JoMox Resonator Neuronium SN 0190

Note: Auction links are affiliate links for which the site may be compensated.

via this listing

"Welcome to the sound of MJ YOGI."

"Excellent condition. Amazing synthesizer, ready for last firmware update if needed."

CLICK FOR MORE »

Rare Vintage Baldwin Syntha-Sound Analog Synthesizer

Note: Auction links are affiliate links for which the site may be compensated.

via this listing

You can find a great demo of one previously featured here.

CLICK FOR MORE »

Grp Synthesizer A1

video upload by Gianfranco Carone

CRUM HUM is now for sale!

video upload by Albert Nyström

"Available at https://nystrominstruments.com

Crum Hum is a generative, experimental soundscaping machine developed by NYSTRÖM in 2024."

Seofon MCR Mini Chaos Roll

video upload by Sonic Seed

"A gateway to sonic exploration, the Seofon Mini MCR is the experimental edition of our Seofon series, brought to life by the visionary hands of Xamynot, synthesizer designer at Mad Kids Empire. With its carefully crafted circuitry and minimalist design, this instrument invites you to create and discover sounds like never before.

Now available, the Seofon Mini MCR comes at an artist-friendly price, offering a rare opportunity to step into the Seofon universe. Let it guide you into uncharted territories of experimental music.

https://sonic-seed.com/products/seofo..."

CLICK FOR MORE »

Micro doser vs kastel 2 FX

video upload by errorinstruments paul tas

"Micro doser in to kastel 2 FX nice glitchy ASMR sounds . Deep experimental, but really pocket and small set up you can find sounds that you never heard before check it out Error love Bastl 🙏https://www.errorinstruments.com/a-89... #experimentalmusicalinstrument #eurorack #producer #errorinstruments #euroracksynthesizer #korg #soundart #noisemusic #experimentalmusic #eurorackmodular"