Hi all, I recently made an arduino MIDI to CV device to play the Werkstatt using my computer sequencer/MIDI keyboard. It works very well putting out 1v per octave over 4 octaves (C0 0.47v, C1 1.47v, C2 2.47v, C3 3.47v, C4 4.47v). It's this one: https://learn.sparkfun.com/tutorials/mi ... ol-voltage
Then I made a glide circuit (input from the MIDI CV device, output to the VCO EXP IN on the Werkstatt), which is a replica of the one in the Werkstatt (like this one: https://www.muffwiggler.com/forum/viewt ... f81e35fadb
- but I can't get the glide to work properly!
I've grounded the TL072 op amp chip to the werkstatt and tried taking the power from the KB CV, the Gate and the EG on the Werkstatt and the +3.5 and +5v from the MIDI shield. The +5 on the MIDI/CV is the least worst in that it appears to be engaging the circuit properly - I can hear the glide duration change when I alter the glide potentiometer. But, when I play the lowest 4 notes on the midi keyboard, the glide circuit outputs high (4.47v) then the rest of the four octaves go from 1.44v to 4.47v but all out of tune.
So the glide circuit is basically changing the voltages and I can't for the life of me work out why or what the best way is to go about fixing it.
I'm a novice, so hopefully I'm doing something basic wrong. Any help greatly appreciated!!