* Middle C = C4
* C4 = 60 = 0x3C ⇒ 261.6255653005986
* A440 = A4 = 0x45 ⇒ 440.0
* Semitone = \(2^{\frac{1}{12}}=1.0594630943592953\)

# Hz to Voct
Assuming 1V goes to C4, then to convert Hz to Voct, we want to use logarithms.
* \(f_r=\frac{f}{c_4}\)
* \(V_{\mathrm{oct}}=\mathrm{log}_2(f_r)\)

# Pitches and Numbers
Source: [University of New South Wales](https://newt.phys.unsw.edu.au/jw/notes.html)

![Pitches and Numbers](MidiNoteFrequencies.png)