MATRIXSYNTH: Active vs. Passive Multiples for VCO Control


Thursday, January 05, 2017

Active vs. Passive Multiples for VCO Control


Active vs. Passive Multiples for VCO Control from Learning Modular on Vimeo.

"There is a lot of debate and confusion among modular synth users about whether or not you need an active, buffered multiple to control multiple VCOs accurately in a modular system. The answer is "it depends" - on the buffering and output impedance of the module sending the control voltage, and the input impedance of the modules being controlled. Some combinations work fine with a passive multiple. Some most certainly do not, going out of tune within +/- 1 octave. This video - excerpted from a longer one in my 'Learning Modular Synthesis: Moog Mother-32' course - demonstrates a case where passive multiples do not work. As a result, just to be safe, I keep a few good buffered multiples - like the Intellijel BM or Malekko Performance Mult - in my system, just to be safe. (I also have the Xaoc Dvices Warna II and AJH Synth V-Scale arriving soon.)"

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