[sdiy] How to start tuning a specific VCO driven by a specific keyboard's CV...

[Jean-Pierre Desrochers]

Hi list,

Suppose we have a 61 keys synth keyboard that  
produces 0-5.00vdc output (6 octaves span)
for modular oscillators. I'm designing a
Moog 921B clone oscillator with all the same
front panel controls including FREQUENCY +/-12 semitones
and RANGE selector, and inputs/outputs.
-> I have an 1V/oct CV connector in the module
plugged to the keyboard CV's output.
Here is my question:
If I put the VCO's RANGE selector at 8' position,
put the FREQUENCY pot at mid position (0 semitones)
and press the very first left C key of the keyboard (0.00vdc)
what frequency should I expect from the VCO as
a start for tweaking it's inner trimmers ?
The standard musical freq table states:

C0 = 16.35hz
C1 = 32.70hz
C2 = 65.41hz
C3 = 130.81hz
C4 = 261.63hz
C5 = 523.25hz
C6 = 1046.50hz
C7 = 2093.00hz
C8 = 4186.01hz

Your support very appreciated !
Many thanks!
JP