Good evening, community. My neurons have melted, and I can’t seem to find the mathematical relationship between the BPM of a clock (in this case, CLKD from Impromptu) and the voltage applied to the BPM/CV input. What I’m certain of is that it’s not linear, as indicated by the graph from the following values: -1.977 V > 30 BPM / -1.012 V > 60 BPM / 0 V > 120 BPM / 1 V > 240 BPM and 1.323 V > 300 BPM. I’m sure this relationship is in the module code, but I’m not expert enough to find it… Could someone help me?
I expect it is exponential in theory as with frequency/Hz.
(Herz is phase or “beats” per second)
30 bpm = 0.5 Hz, 60 bpm = 1Hz, 120 bpm = 2Hz Etc Etc
So it follows an oct (or doubling of bpm) per Volt.
Correct me if I am wrong 
^^^ This agrees with the documentation Voltage Standards - VCV Rack Manual
Thank you very much for these very clear answers. It also helped me realize that a clock is nothing more or less than an oscillator delivering rectangular signals.( My neurons are really tired!)
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