Isaiah Odhner 1j01
1j01
/ notes.coffee
Last active
March 3, 2018 03:51
— forked from stuartmemo/Note to Frequency
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| notes = ['A', 'A#', 'B', 'C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#'] | |
| getFrequency = (noten)-> | |
| 440 * 2 ** ((noten - 49) / notes.length) | |
| getNoteN = (notestr)-> | |
| i = notes.indexOf notestr[0...-1] | |
| octave = parseInt notestr[-1..] | |
| octave -= 1 if i >= notes.indexOf 'C' |