Period: Difference between revisions
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m Minor rephrasing + added to Terms category |
This isn't limited to mos scales |
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The '''period''' of a [[ | The '''period''' of a [[scale]] is the interval at which the scale pattern repeats. Another word for the period is the '''interval of repetition'''. A scale with a period is known as a [[periodic scale]]. The period is usually the same size as the [[equave]] (interval of equivalence) or a fraction thereof. | ||
In [[mos scale]]s, the period is one of the two defining intervals, the other being the [[generator]]. For example: | |||
* The diatonic scale (LLsLLLs) has period equal to the octave. | * The diatonic scale (LLsLLLs) has period equal to the octave. | ||
* The diminished scale (sLsLsLsL) has period 1\4, | * The diminished scale (sLsLsLsL) has period 1\4, since the mos pattern sL repeats at every 300 cents. | ||
The same definition applies for a [[rank]]-2 temperament, when the temperament is seen as generating a | |||
The same definition applies for a [[rank]]-2 temperament, when the temperament is seen as generating a mos. Every interval of a rank-2 temperament is a sum of some number of the period and some number of the generator of the temperament. | |||
[[Category: | [[Category:Scale]] | ||
[[Category:Rank 2]] | [[Category:Rank 2]] | ||
[[Category:Terms]] | [[Category:Terms]] | ||
Revision as of 01:31, 12 December 2022
The period of a scale is the interval at which the scale pattern repeats. Another word for the period is the interval of repetition. A scale with a period is known as a periodic scale. The period is usually the same size as the equave (interval of equivalence) or a fraction thereof.
In mos scales, the period is one of the two defining intervals, the other being the generator. For example:
- The diatonic scale (LLsLLLs) has period equal to the octave.
- The diminished scale (sLsLsLsL) has period 1\4, since the mos pattern sL repeats at every 300 cents.
The same definition applies for a rank-2 temperament, when the temperament is seen as generating a mos. Every interval of a rank-2 temperament is a sum of some number of the period and some number of the generator of the temperament.