I built this specifically to add MIDI control to my Moog Werkstatt, but it could be used to add MIDI control to any other 1 volt per octave synthesizer. Design choices that distinguish this conver...Read More…
I built this specifically to add MIDI control to my Moog Werkstatt, but it could be used to add MIDI control to any other 1 volt per octave synthesizer. Design choices that distinguish this converter from others are:
It is pretty bare bones. My intent was to make it suitable for wiring into other devices rather than, say, producing a complete standalone unit or Eurorack module.
It outputs velocity control voltage for each note. Velocity data is included with every MIDI note, so it makes sense to use it for additional expression.
It supports pitchbend as +/- a whole step. Pitchbend is required to play microtonal pitches, as I like to do.
It uses a 12-bit DAC. This means that the pitch resolution is (5 octaves / 4096 voltage levels) ~1.46 cents, which is a smaller interval than we can discern.
Powered by ground and +5V lines. Be sure to use a clean source because the tuning depends on it.
Accepts as input MIDI notes and pitchbend events from all MIDI channels. MIDI notes 24-84 (3 octaves below middle C and 2 above) are the 5 intended octaves. MIDI notes 0-23 and 85-127 just wrap around, i.e., 0-23 are the same as 60-83, and 85-127 are the same as 25-67. Other MIDI messages are ignored.
Outputs 5 octaves of pitch control voltage (0-5V, 1 volt per octave), velocity control voltage (0-5V), and gate (0V off, 5V on).
Last note priority for up to 10 held notes. More than 10 notes held results in dropping notes.
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I am one person with a day job building these on the side. Time to shipping after ordering is estimated at 3 business days if I have all the parts and 10 if I do not. (I plan to keep the parts in stock, but I also have little control if I get a bunch of orders all at once.) Also, I am glad to ship to other countries. Please let me know which country you would like shipped to, and I will add a shipping rate. Thanks!
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I like synthesizers and particularly the otherly musical expressions they make accessible.