MATRIXSYNTH: "The Organ Machine" combo organ CV interface and how it works (ADCs and multiplexers!)

Sunday, April 05, 2020

"The Organ Machine" combo organ CV interface and how it works (ADCs and multiplexers!)


Published on Apr 5, 2020

"The interface circuits we designed and built for 'The Organ Machine' allow a vintage combo organ or other instrument with a divide-down architecture to be controlled with control voltage sequencers, with a separate CV input for each octave. Each octave of the organ is used as the core of a separate synthesizer voice after being fed through the envelopes and filters of a Music From Outer Space modular synth and Buchla clone low pass gates. In this video, Darian demos the instrument and Alison explains how it works, with an explanation of what ADCs (analog to digital converters) and multiplexers do.

This isn't the kind of thing we usually do, but we thought it might be fun to share this weird DIY project while everyone's at home because of the Coronavirus!

Bell Tone Synth Works is a electronic musical instrument repair workshop in Philadelphia, PA specializing in restoration repair of vintage synthesizers and organs.

Website: http://belltonesynthworks.com"

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