Cent (music)
The
cent is a
logarithmic measure of relative
pitch or
intervals. 1200 cents are equal to one
octave, and an
equally tempered semitone is equal to 100 cents. The formula to determine the value in cents between two notes with
frequencies a and
b is:
The measure was developed by A. J. Ellis around the
1870s, and was published in his edition of
Hermann von Helmholtz's
On the Sensations of Tone. It has since become the standard way of measuring intervals in
equal temperament systems or for comparison with equal temperament systems.
See also: music
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