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| Name = (perfect) unison, (perfect) prime, 1st harmonic, 1st subharmonic, fundamental | | Name = (perfect) unison, (perfect) prime, 1st harmonic, 1st subharmonic, fundamental | ||
| Color name = w1, wa unison | | Color name = w1, wa unison | ||
}} | }}The '''unison''' (interval ratio '''1/1''') is the [[interval]] between two tones that are identical in pitch. In the [[harmonic series]], 1/1 is the 1st [[harmonic]], and likewise in the [[subharmonic series]] 1/1 is the first [[subharmonic]]- this is because it acts as the fundamental to both series. | ||
The '''unison''' (interval ratio '''1/1''') is the [[interval]] between two tones that are identical in pitch. In the [[harmonic series]], 1/1 is the 1st [[harmonic]], and likewise in the [[subharmonic series]] 1/1 is the first [[subharmonic]]- this is because it acts as the fundamental to both series. | |||
Measured in [[cent]]s (or any other logarithmic measure such as [[millioctave]]s, [[EDO]] steps, etc.), the unison's size is exactly 0. This is because the distance between two identical pitches is zero. As such, the unison can be considered as a degenerate interval. | Measured in [[cent]]s (or any other logarithmic measure such as [[millioctave]]s, [[EDO]] steps, etc.), the unison's size is exactly 0. This is because the distance between two identical pitches is zero. As such, the unison can be considered as a degenerate interval. | ||
In [[just intonation]], 1/1 represents the base frequency from which an interval is measured. | In [[just intonation]], 1/1 represents the base frequency from which an interval is measured. | ||
The unison may also be treated as an interval region with a width of 0 cents corresponding to exactly the interval 1/1. | |||
== Unison (interval region) == | == Unison (interval region) == | ||
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* [[Octave]] | * [[Octave]] | ||
* [[Octave reduction]] | * [[Octave reduction]] | ||
[[Category:Unison| ]] | |||
[[Category:Unison| ]] <!-- main article --> | {{Infobox interval region|Name=Unison|Cents lower=0|Cents upper=0|Cents upper wide=6|JI intervals=1/1|Complement=[[Octave]]|Lower region=|Higher region=[[Comma and diesis]]}}<!-- main article --> | ||
[[Category:1-odd-limit]] | [[Category:1-odd-limit]] | ||
{{Wikipedia|Unison}} | |||