Interval of equivalence: Difference between revisions
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* [[Period]] | * [[Period]] | ||
* [[Stretched tuning]] | * [[Stretched tuning]] | ||
* [[Equave limit]] | |||
== Notes == | == Notes == | ||
Revision as of 22:17, 7 September 2024
In a periodic scale, the equave (/ˈiːkwɪv/ EE-kwiv or /ˈiːkwəv/ EE-kwəv), also called interval of equivalence, equivalence interval, formal octave[1] or pseudo-octave[2][note 1], is the interval such that pitches separated by it are considered equivalent and are elements of the same pitch class.
The equave of a scale is generally the same as its period or a multiple of its period.
Etymology
The term equave was coined by Inthar. It is a portmanteau of equivalence and octave.
Examples
- In octave-equivalent scales, the equave is 2/1.
- In Bohlen-Pierce, the equave is 3/1.
- In edfs, the equave is 3/2.
See also
Notes
- ↑ The term pseudo-octave generally designates any kind of equave, although it is sometimes used specifically to designate a stretched or compressed octave.
References
- ↑ Op de Coul, E.F. Scala help.
- ↑ ASCL Specification. Ableton.