Poly-61 CV injection points

poly61CVpoints

These are some CV injection points of the Poly-61. You need to connect the CV with an additional resistor. Try 100k.Decrease the value for a stronger effect and increase it for a weaker influence.

If you connect one side of the potentiometer to +15V and the other one to -15 you can adjust the value up and down with the center position as default. In  this case use the following resistor values:

Cutoff: 100k
Res: 330kAttack: 330k
Decay: 330k
Sustain: 220k
Release: 220k
MG speed: 220k

These give you about the same range as the original controls.

In case you are using the CV outtputs of the ModyPoly, connect a 100nF capacitor across the negative input and the output of the opamp to filter out high frequencies.

This is not tested but I am pretty sure it is working.

[edit: Cutoff, resonance, attack and decay work very well. Very complicated to add control to the other parameters]

2 thoughts on “Poly-61 CV injection points

  1. Newbie questions here, so thanks for your help Tobi.

    So if Im reading this correctly and want to hook my extra ModyPoly CV’s to Res and Decay I would solder the wires directly to R32 for Res and R73 for Decay?

    And do I solder the resistor to the wire and then the XXXk resistor the Rxx locations?

    Some step-by-step pictures for us electronically challenged would be helpful 🙂 Thanks

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