[sdiy] MIDI2CV & Arpeggio question..

[Tim Ressel]

Jean-Pierre,

I like to use the notation (pun intended) of middle C = C4 = 261.6 Hz. This makes C0 = 16.35 Hz and C10 = 16742.4 Hz. Then I simply make the number be the volts: 4 volts = C4. This yields 0-10V = 16-16000 hz.

This arrangement has an added math advantage when working with a processor: the conversion from volts to frequency is (2^Volts_in) * F_lowest. In other words, if you want to sample a CV and produce the corresponding frequency, raise 2 to the power of the CV voltage and multiply by the frequency you want 0 volts to be. 

--TimR