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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}} | |||
Revision as of 10:27, 14 March 2025
| Interval information |
(perfect) prime,
1st harmonic,
1st subharmonic,
fundamental
harmonic,
highly composite harmonic
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 cents (or any other logarithmic measure such as millioctaves, 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.
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)
See also
| ← | Interval region | Comma and diesis → |
Example JI intervals
Related regions
