Note: links to listings are affiliate links for which the site may be compensated.
via this listing
Additional Perfect Circuit listings
Sunday, December 07, 2025
Octave Cat SRM II SN G1078 w/ Original Box
Note: links to listings are affiliate links for which the site may be compensated.
via this Reverb listing
via this Reverb listing
Roland SH7 SN 670163
Note: links to listings are affiliate links for which the site may be compensated.
via this Reverb listing
"Roland SH-7 (late ’70s), classic 2-VCO analog mono synth with ring mod, sync, sample & hold, noise, resonant VCF and multi-wave LFO."
via this Reverb listing
"Roland SH-7 (late ’70s), classic 2-VCO analog mono synth with ring mod, sync, sample & hold, noise, resonant VCF and multi-wave LFO."
Yamaha SK-30 w/ Tubbutec Midi SN 3210
Note: links to listings are affiliate links for which the site may be compensated.
via this Reverb listing
"well preserved SK-30 with Tubbutec midi kit
($800 pro installation + €200 kit courtesy Patchwork Labs Brooklyn)
for more info on all midi functionality of the €200 KAC-62100 kit check the Tubbutec site"
via Tubbutec:
"TM62100 adds MIDI and additional features to SK15, SK20, SK30 and SK50D synthesizers. It is a direct replacement for the Yamaha YM62100 / YM621 key assigner and can also be used to replace defective original ICs – even when midi is not required. The original behaviour is fully maintained.
TM62100 might also work in organs such as Yamaha D85, please read these notes.
Features:
MIDI input and output on several channels with optional soft-through
Independent midi control of upper keyboard, lower keyboard and pedal sections
Full tonal range in split mode
Midi filter cutoff and resonance control
Additional filter LFO
Midi sustain control
Midi portamento control
Midi aftertouch
Note priority for the pedal/BASS section: Lowest/Last/Highest note
Built in configuration menu can set midi channels and other parameters.
Non-destructive installation can be reverted to original"
via this Reverb listing
"well preserved SK-30 with Tubbutec midi kit
($800 pro installation + €200 kit courtesy Patchwork Labs Brooklyn)
for more info on all midi functionality of the €200 KAC-62100 kit check the Tubbutec site"
via Tubbutec:
"TM62100 adds MIDI and additional features to SK15, SK20, SK30 and SK50D synthesizers. It is a direct replacement for the Yamaha YM62100 / YM621 key assigner and can also be used to replace defective original ICs – even when midi is not required. The original behaviour is fully maintained.TM62100 might also work in organs such as Yamaha D85, please read these notes.
Features:
MIDI input and output on several channels with optional soft-through
Independent midi control of upper keyboard, lower keyboard and pedal sections
Full tonal range in split mode
Midi filter cutoff and resonance control
Additional filter LFO
Midi sustain control
Midi portamento control
Midi aftertouch
Note priority for the pedal/BASS section: Lowest/Last/Highest note
Built in configuration menu can set midi channels and other parameters.
Non-destructive installation can be reverted to original"
Michigan Synth Works Xena SMR4
Note: links to listings are affiliate links for which the site may be compensated.
via this Reverb listing
"Awesome synth. A remake of the Mutable Instruments Ambika. This version has the classic SMR4 filters. Comes with original box and power supply."
You can find demos of Xena in previous posts here.
via this Reverb listing
"Awesome synth. A remake of the Mutable Instruments Ambika. This version has the classic SMR4 filters. Comes with original box and power supply."
You can find demos of Xena in previous posts here.
Yamaha DX7 Voice Data Book by David Bristow for Keyboard Magazine in Japanese
Note: links to listings are affiliate links for which the site may be compensated.
via this Reverb listing
"Ultra Rare Voice Data Book by the great David Bristow, Japan only release!!
Full of unique patches to program into your amazing DX7.
Never offered on Reverb and Ebay before, ever, grab your chance to own this very sought after DX7 historical item."
Addtional posts mentioning David Bristow.
via this Reverb listing
"Ultra Rare Voice Data Book by the great David Bristow, Japan only release!!
Full of unique patches to program into your amazing DX7.
Never offered on Reverb and Ebay before, ever, grab your chance to own this very sought after DX7 historical item."
Addtional posts mentioning David Bristow.
Aug 11 1999 Electrix Warp Factory Vocoder SN 002488
Note: links to listings are affiliate links for which the site may be compensated.
via this eBay listing
via this eBay listing
Synth:Bit – 16‑Note Micro:Bit Synthesizer Keyboard Module with OLED Display
via this eBay listing
"Synth:Bit – 16‑Note Micro:Bit Synthesizer Keyboard Module with OLED Display, Battery Pack & Audio Jack, Lego‑Compatible Base, Matrix Inputs, Jumper Pins for Expansion
16‑Note Synthesizer for Micro:bit — turns your Micro:bit into a full octave keyboard (16 inputs in a 4×4 matrix) for creative music projects and experimentation.
Integrated Audio Output & Battery Pack — built‑in audio jack to hook up a speaker and a portable battery pack so you can use it anywhere.
OLED Display & Intuitive UI — clear screen interface for visual feedback, settings, and control of synthesizer parameters.
Lego‑Compatible & Breadboard Friendly — board spacing fits LEGO bricks; jumper pins allow easy breadboard or external keypad integration.
Expandable & Open Source — supports expansion via jumper pins, external keypads, or custom builds; program via MakeCode, Python, or microcontroller tools."
Further adventures in DIY Buchla 100 with La 67 Counterparts
video upload by Tom Churchill
"A couple of years ago, I made a video about the La 67 Mort’s Barge, which is a replica of a set of five Buchla 100 series modules from the 1960s. Now I’ve expanded it with five more DIY modules that La 67 recently made available again: the 144 dual square wave generator, the 111 dual ring modulator, the 106 six-channel mixer, the 156 control voltage processor, and the 191 sharp cutoff filter. In this video, I do a quick tour of the new modules, then I run through a few patches to let you hear how they sound in context.
Note: this video is not sponsored; La 67 has no involvement."
Chapters:
00:00 Patch previews
01:41 Introduction
03:44 144 Dual Square Wave Generator
06:25 191 Sharp Cutoff Filter
09:17 106 Six Channel Mixer
09:42 111 Dual Ring Modulator
10:00 156 Control Voltage Processor
11:10 Resonant band-pass filtering
15:41 Square wave FM and resonant low-pass filtering
18:32 Square wave techno jam
20:32 Four-oscillator mega-drone
25:57 Sci-fi ring-mod sequences
29:44 Polymetric sequencing with external gear
34:00 Robotic ring-mod electro jam
140 BPM Wub Bass | Buchla Music Easel Modern
video upload by Akihiko Matsumoto
"This collection includes ninety four Wub Bass loops in the sample pack.
Buchla Modular Synth (Sample Pack) https://akihikomatsumoto.sellfy.store...
Drum: Future Garage Kit from Ultimate Electronic Drum Kit (Sample Pack) https://akihikomatsumoto.sellfy.store...
Akihiko Matsumoto
Study Site https://akihikomatsumoto.com/study/"
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© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
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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































