21/11: Difference between revisions
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'''21/11''' | {{Infobox Interval | ||
| Name = large undecimal diminished octave, undecimal major seventh, pentacircle major seventh | |||
| Color name = 1uz8, luzo 8ve | |||
| Sound = jid_21_11_pluck_adu_dr220.mp3 | |||
}} | |||
'''21/11''', commonly known as the '''large undecimal diminished octave''', is an [[11-limit]] interval, and the octave complement of [[22/21]]. | |||
In many notation systems (e.g. [[FJS]], [[HEJI]]), it is an imperfect octave, as it is the octave minus a stack consisting of an [[33/32|undecimal quartertone (33/32)]] and a [[64/63|septimal comma (64/63)]], neither of which changes the [[scale|scale degree]] or [[interval quality|quality]]. However, it is only sharp of the [[243/128|Pythagorean major seventh (243/128)]] by a [[896/891|pentacircle comma (896/891)]]. For this reason it could be called the '''pentacircle major seventh'''. | |||
[[ | Of note is that the Huygens-Fokker Foundation dubs this interval the '''undecimal major seventh''', which also makes sense, resulting in this interval being perhaps best classified as a "sevtave" – a type of cross between a seventh and an octave. | ||
== See also == | |||
* [[22/21]] – its [[octave complement]] | |||
[[Category:Octave]] | |||
[[Category:Diminished octave]] | |||
[[Category:Seventh]] | |||
[[Category:Major seventh]] | |||
[[Category:Over-11 intervals]] | |||
Latest revision as of 08:41, 25 October 2024
| Interval information |
undecimal major seventh,
pentacircle major seventh
[sound info]
21/11, commonly known as the large undecimal diminished octave, is an 11-limit interval, and the octave complement of 22/21.
In many notation systems (e.g. FJS, HEJI), it is an imperfect octave, as it is the octave minus a stack consisting of an undecimal quartertone (33/32) and a septimal comma (64/63), neither of which changes the scale degree or quality. However, it is only sharp of the Pythagorean major seventh (243/128) by a pentacircle comma (896/891). For this reason it could be called the pentacircle major seventh.
Of note is that the Huygens-Fokker Foundation dubs this interval the undecimal major seventh, which also makes sense, resulting in this interval being perhaps best classified as a "sevtave" – a type of cross between a seventh and an octave.
See also
- 22/21 – its octave complement