One quick question: Is it my assumption the MIDIJACK uses the standard one volt per octave scaling?
The MIDIJACK II: Hertz so good! is Hz/volt. The Original MIDIJACK is shipped from the factory calibrated to exactly 1 volt per octave. When you pull it out of the wrapper it will give you 3.00v for MIDI note 36, 4.00v for 48, 5.00v for 60, 6.00v for 72, 7.00v for 84, 8.00v for 96, 9.00v for 108, 10.00v for 120, on up to 10.58v for the highest known MIDI note 127. For an easy test, the MIDIJACK has the automatic user calibration mode enabled on power-up, so it puts out the highest note 127 until you send it MIDI or press the button. The gate is off at this time so it will remain silent. You can check the voltage to see it is 10.58v and adjust it if it isn’t. The problem is that most analogs are out-of-whack now, just as they were the day they were new. The truth? People didn’t use CV/gate control in the 70’s, either. The Micromoog sold thousands and no one ever noticed it was factory set to .9v/octave and non-adjustable. Most older MIDI controllers cannot compensate for that, but with t
