Cent and Semitone 音分和半音

cent 音分
semitone/half step/half tone 半音
whole tone 全音
accidental 變音記號

1 semitone = 100 cents

octave 八度音

一個八度音 = 12個半音 = 5個全音 + 2個半音
Twelve-tone equal temperament (十二平均律)
- divide an octave into 12 equal parts

Number of Semitones between Two Frequencies (兩個頻率間相差的半音數):

n = abs(log₂(f₁/f₂)/log₂(2^(1/12))) = abs(12log₂(f₁/f₂))

Reference

How to find the number of semitones between two frequencies?