Sunday, December 07, 2025
This switch UNLOCKS your Donner MEDO
video upload by Floyd Steinberg
"I don't know why this is not the factory default, really. #donner #medo #donnermedo #midicontroller #synth #groovebox Music demo begins at 05:58
Maks' MIDI forwarder: https://maks.github.io/webmidirouter/
HÄLP ZIS CHANNEL
https://www.patreon.com/floyd_steinberg
https://floydsteinberg.gumroad.com/
https://floydsteinberg.bandcamp.com/"
Moog Musonics Sonic V Synthesizer
Note: links to listings are affiliate links for which the site may be compensated.
via this eBay listing
"We got this unit from its original owner. It was very well taken care of over the years and came to us in great working order for a non-refurbished vintage piece - everything works, there might be slight crackle from dirty contacts here and there, and some controls might not move as smoothly as we'd like, but its pretty surprising how well it functions. We normally do full rebuilds of these that includes lots of servicing, cleaning inside and out, and future-proofing before we resell them, but this work takes a long time and costs us a lot. Since we already have another example in stock that's received our meticulous refurb job but that hasn't sold yet (use our site's search feature for sonic v to find it), we figured we'd offer this one as-is for less for now. If the other one sells first, we will likely give this one the full treatment and up the price once it's done.
The original wooden frame surrounding the front panel on the stock sonic V is thin and protrudes and has been broken in other examples we have seen. This one's frame broke a long time ago, so the original owner had a woodworker redo that section. As you can see, the newer wood is slightly lighter in color. When this unit was photographed, the bottom right corner of this section was a bit loose, but we have since glued it back in place, in case you noticed it looking slightly lifted in the photos. It's now fine. The control panel to the left of the keyboard was replaced long ago with a third party panel."
via this eBay listing
"We got this unit from its original owner. It was very well taken care of over the years and came to us in great working order for a non-refurbished vintage piece - everything works, there might be slight crackle from dirty contacts here and there, and some controls might not move as smoothly as we'd like, but its pretty surprising how well it functions. We normally do full rebuilds of these that includes lots of servicing, cleaning inside and out, and future-proofing before we resell them, but this work takes a long time and costs us a lot. Since we already have another example in stock that's received our meticulous refurb job but that hasn't sold yet (use our site's search feature for sonic v to find it), we figured we'd offer this one as-is for less for now. If the other one sells first, we will likely give this one the full treatment and up the price once it's done.
The original wooden frame surrounding the front panel on the stock sonic V is thin and protrudes and has been broken in other examples we have seen. This one's frame broke a long time ago, so the original owner had a woodworker redo that section. As you can see, the newer wood is slightly lighter in color. When this unit was photographed, the bottom right corner of this section was a bit loose, but we have since glued it back in place, in case you noticed it looking slightly lifted in the photos. It's now fine. The control panel to the left of the keyboard was replaced long ago with a third party panel."
Dreadbox Artemis Polyphonic Analog Synthesizer Module
Note: links to listings are affiliate links for which the site may be compensated.
via this listing
Additional Perfect Circuit listings
via this listing
Additional Perfect Circuit listings
Dave Smith Instruments Prophet 08 PE Analog Keyboard Synthesizer SN 01994
Note: links to listings are affiliate links for which the site may be compensated.
via this listing
Additional Perfect Circuit listings
via this listing
Additional Perfect Circuit listings
Dave Smith Instruments Pro-2 Paraphonic Hybrid Synthesizer
Note: links to listings are affiliate links for which the site may be compensated.
via this listing
Additional Perfect Circuit listings
via this listing
Additional Perfect Circuit listings
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.
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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
