MATRIXSYNTH

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Befaco modular and more.

Monotron Mod

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YouTube Published on May 18, 2012 by Cynosure48

"A sound demo of my modded Monotron. Listen on good speakers to hear
the full bass. More info here
http://www.jacobwatters.com/monotron-mod.php

Modifications include: MIDI-IF kit, CV control, Pulse Wave (with PWM,
high-pass filter and low-pass filter), Sub Osc 1 (one octave down)
with low-pass filter, Sub Osc 2 (2 octaves down) with low-pass filter,
AD Envelope, and Overdrive feedback loop."

via Jacob Watters on The MATRIXSYNTH Lounge

monotrons on eBay

Synthesizers.com modules, power supply and cabinet

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via this auction

"The modules included are the Q104 Midi Interface, Q118 Instrument Interface (for controlling with another instrument such as guitar, drum machine, etc.), Q106 Oscillator, Q109 Envelope Generator, Q108 Amplifier, and Q137 Power Control. There are five cables for connecting the modules, 3 short and 2 long."