Dreadbox Artemis Polyphonic Analog Synthesizer Module

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via this listing

Additional Perfect Circuit listings

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Dave Smith Instruments Prophet 08 PE Analog Keyboard Synthesizer SN 01994

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Dave Smith Instruments Pro-2 Paraphonic Hybrid Synthesizer

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Octave Cat SRM II SN G1078 w/ Original Box

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Roland SH7 SN 670163

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"Roland SH-7 (late ’70s), classic 2-VCO analog mono synth with ring mod, sync, sample & hold, noise, resonant VCF and multi-wave LFO."

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Yamaha SK-30 w/ Tubbutec Midi SN 3210

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"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"

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Michigan Synth Works Xena SMR4

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"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.

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Yamaha DX7 Voice Data Book by David Bristow for Keyboard Magazine in Japanese

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"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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Aug 11 1999 Electrix Warp Factory Vocoder SN 002488

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Synth:Bit – 16‑Note Micro:Bit Synthesizer Keyboard Module with OLED Display

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"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."

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