16/15: Difference between revisions

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'''16/15'''
{{Infobox Interval
|4 -1 -1>
| Name = just diatonic semitone, classic(al) diatonic semitone, ptolemaic diatonic semitone
| Comma = yes
| Color name = g2, gu 2nd
| Sound = jid_16_15_pluck_adu_dr220.mp3
}}
{{Wikipedia|Semitone}}
The [[5-limit]] [[superparticular]] interval '''16/15''' is the '''just diatonic semitone''', '''classic(al) diatonic semitone''' or '''ptolemaic diatonic semitone'''<ref>For reference, see [[5-limit]]. </ref>.


111.73129 cents
It is the difference between:
* the major second [[9/8]] and the minor third [[6/5]];
* the major third [[5/4]] and the fourth [[4/3]];
* the perfect fifth [[3/2]] and the minor sixth [[8/5]];
* the major sixth [[5/3]] and the minor seventh [[16/9]];
* the major seventh [[15/8]] and the perfect octave [[2/1]].


[[File:jid_16_15_pluck_adu_dr220.mp3]] [[:File:jid_16_15_pluck_adu_dr220.mp3|sound sample]]
== Approximation ==
16/15 is very accurately approximated by [[43edo]] (4\43).


The 5-limit just diatonic semitone is the [[superparticular|superparticular]] interval 16/15 -- the difference between the major third [[5/4|5/4]] and the fourth [[4/3|4/3]], and between [[3/2|3/2]] and [[8/5|8/5]].
== Temperaments ==
When this ratio is taken as a [[comma]] to be [[tempering out|tempered out]], it produces [[father]] temperament, and lends itself the name '''father comma'''. In this [[exotemperament]], 4/3 and 5/4 are equated, and major thirds and fifths become [[octave complement]]s of each other. It is a [[Mersenne comma]].


When this ratio is taken as a comma to be tempered, it produces [[Father|father]] temperament, where 4/3 and 5/4 are equated. In this temperament, major thirds and fifths become octave-inverses of each other.
The following [[linear temperament]]s are [[generate]]d by a [[~]]16/15:
[[Category:5-limit]]
* [[Vavoom]]
[[Category:interval]]
* [[Stockhausenic]]
[[Category:just_interval]]
 
[[Category:ratio]]
In addition, this [[fractional-octave temperaments]] are generated by a ~16/15:
[[Category:semitone]]
* [[Quintosec]]
{{todo|complete list}}
 
Some [[11th-octave temperaments]] treat ~16/15 as the period, including [[hendecatonic]].
 
== See also ==
* [[15/8]] – its [[octave complement]]
* [[45/32]] – its [[fifth complement]]
* [[5/4]] – its [[fourth complement]]
* [[256/243]] – the Pythagorean (3-limit) diatonic semitone
* [[Gallery of just intervals]]
* [[List of superparticular intervals]]
 
== Notes ==
<references/>
 
[[Category:Second]]
[[Category:Semitone]]
[[Category:Father]]
[[Category:Commas named after their interval size]]