Cent: Difference between revisions
m +interwiki |
m +interwiki, linking, and style |
||
| Line 5: | Line 5: | ||
| ja = セント | | ja = セント | ||
| ko = 센트 | | ko = 센트 | ||
| ro = Centisunet | |||
}} | }} | ||
{{Wikipedia|Cent (music)}} | {{Wikipedia|Cent (music)}} | ||
The '''cent''' (symbol: '''¢''') is a [[unit of interval size]] equal to exactly 1/100th (or 1%) of a [[12edo]] semitone. In other words, cents divide the half step (semitone) of 12edo into 100 equal parts. First proposed in the late 19th century by {{w|Alexander John Ellis|Alexander J. Ellis}}, the cent may also be defined as the {{w|logarithm}} base 1200th root of 2 of a ratio. | The '''cent''' (symbol: '''¢''') is a [[unit of interval size]] equal to exactly 1/100th (or 1%) of a [[12edo]] [[semitone]]. In other words, cents divide the half step (semitone) of 12edo into 100 equal parts. First proposed in the late 19th century by {{w|Alexander John Ellis|Alexander J. Ellis}}, the cent may also be defined as the {{w|logarithm}} base 1200th root of 2 of a ratio. | ||
Cents are often used to express the size of intervals in different tuning systems, sometimes to express the accuracy of the representation of a [[just intonation]] [[interval]] in a given system. | Cents are often used to express the size of intervals in different tuning systems, sometimes to express the accuracy of the representation of a [[just intonation]] [[interval]] in a given system. | ||
| Line 36: | Line 37: | ||
=== Monzo to cents === | === Monzo to cents === | ||
To find the size ''s'' of a just interval in cents from its [[monzo]] '''m''' = {{monzo| m<sub>1</sub> m<sub>2</sub> m<sub>3</sub> … }}, left-multiply '''m''' by the [[just tuning map]] in cents T<sub>J</sub> = {{val| 1200.000 1901.955 2786.314 … }} | To find the size ''s'' of a just interval in cents from its [[monzo]] '''m''' = {{monzo| m<sub>1</sub> m<sub>2</sub> m<sub>3</sub> … }}, left-multiply '''m''' by the [[just tuning map]] in cents ''T''<sub>''J''</sub> = {{val| 1200.000 1901.955 2786.314 … }} | ||
<math>\displaystyle s = T_J \cdot \vec m</math> | <math>\displaystyle s = T_J \cdot \vec m</math> | ||