MATRIXSYNTH: Auctions

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Friday, October 16, 2026

Novation Bass Station II Analog Keyboard Synthesizer Swifty Edition

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Moog Sirin Analog Synthesizer

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Landscape Stereo Field Touch Plate Synthesizer

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Lambda Synthetics PolyPulse Algorithmic Performance Workstation

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POLYEND TRACKER DESKTOP SAMPLER SYNTH & SEQUENCER w/ Original Box

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Thursday, October 15, 2026

Elektron Digitone II 16-Track Polyphonic Digital Synthesizer

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Dreadbox Typhon Analog Synthesizer Desktop Module

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Dave Smith Instruments Tempest Analog Synthesizer + Drum Machine SN 03029

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Moog Minimoog Voyager Performer Edition Select Series White with Soft Case

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via this Reverb listing

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Digital Keyboards Synergy II+ 2 synthesizer w computer guts SN 01209

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via this eBay listing

Additional Tone Tweakers Listings

Pics of the inside below.

"This unit was professionally serviced. The Synergy II+ is a digital additive/FM synthesizer that sounds like no other. Somewhat similar to the extremely popular Yamaha DX7, it's tone is mellower and warmer. A popular website states 700-800 were made and estimates less than 100 are in operation today. We don't know how they came up with this estimation, but this one's working great, as we just fully serviced it. Famous users include Jay Wires, Wendy Carlos, BT (crumar gds), Junkie XL and Steely Dan. Carlos used it on the Tron soundtrack and other recordings.

Previously, one needed an old Kaypro computer with special software to edit sounds, but someone recently developed an editor that can be run on a modern computer. We haven't used it yet but are really excited to. Please buy this now, before we decide to keep it!

This particular example includes the circuitry of a Kaypro or equivalent computer's CPU. (See pics) Connections were added to the back panel for the accessories, but they were not included when we purchased this item, so we were unable to test this additional computer and disconnected it during restoration, though we left it in place in case a future owner has access to accessories and wants to try to get it running (no guarantees about that though since we didn't test it). The ports on the back have not been tested as we don't have anything that hooks up to them.

There are currently a few patches that are silent, and the first one is low volume and voices change octaves in a seemingly random fashion. We suspect these patches just need to be reprogrammed. At some point, we hope to find time to download and learn the modern editing software mentioned above so we can reprogram these patches, but time is limited, so we may just leave this up to the next owner who we assume will want to load in their own patches. The patches currently in memory are a mix of organ, piano and what seem to be orchestral type sounds."

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Future Retro Orb MIDI CV Gate Pattern Step Sequencer SN ORB020

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via this eBay listing

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Wednesday, October 14, 2026

Musitronics Mu-Tron Phasor II - Serviced w/Restoration

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via this eBay listing

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"This one is in fair cosmetic condition and working 100%. It has just been serviced and with some restoration. As you can, this is the original and not the modern reissue, or Chinese clone. Although this listing is marked as a US sale only, I will ship to most countries. Not sold as-is!

Cosmetically- Nothing is mint in my opinion and this one is no exception. There are a lot of imperfections, but overall it looks decent. All of the visible screws were replaced.

Internally- Beside a couple of repairs, the unit has been completely disassembled and cleaned, all potentiometers, the switch, and jacks have been cleaned, all of the electrolytic capacitors have been replaced and some solder joints touched up. This might be updated."

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