CGrassin

# MIT License
# Python to convert a string note (eg. "A4") to a frequency (eg. 440).
# Inspired by https://gist.github.com/stuartmemo/3766449

def getFrequency(note, A4=440):
    notes = ['A', 'A#', 'B', 'C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#']

    octave = int(note[2]) if len(note) == 3 else int(note[1])
        
    keyNumber = notes.index(note[0:-1]);