MATRIXSYNTH: "Living VCOs"


Sunday, March 29, 2009

"Living VCOs"

MP3
via JH Living VCOs
"My goal was to build a set of VCOs that have the untamed bass range power of early EMS and Moog VCOs, but which are tracking a keyboard voltage over 5 or more octaves nevertheless. I found that "untamed" Beating in the bass range and controlled beating in higher octaves is not possible with standard exponential 1V/Oct oscillators. A good part of that special sound of early Moog and EMS oscillators is not because of any "randomness", "unstability", "instability" or "noisyness", as so often is said. A good deal of their behavior is because of that, but it is not the whole story. There are also some very deterministic factors in these old circuits which have been unpleasant side effects for the designers back then, but which are worth a closer analysis when we're designing a musical VCO today. This is implemented in form of three "linear detune" potentiometers on the JH-5A VCOs."

4 comments:

  1. I am really surprised how good these sound. You seem to have found some interesting things. Will you ever sell completed modules? I would think they would be very popular...

    ReplyDelete
  2. I'll take two, in every color.

    ReplyDelete
  3. Maybe we can talk Suit & Tie Guy into it. :-)

    ReplyDelete
  4. I don't plan to sell complete modules myself, but I'll sell boards to module builders if there is any interest. Inquiries are welcome!

    JH.

    ReplyDelete

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