12:14:18:21: Difference between revisions

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{{Infobox Chord|ColorName=zo-7 or z7}}
{{Infobox Chord|ColorName=zo-7 or z7}}
'''12:14:18:21''', a ''subminor seventh chord'' or ''septimal minor seventh chord'', is an [[anomalous saturated suspension]] in the [[9-odd-limit]].
'''12:14:18:21''', the ''subminor seventh chord'' or ''septimal minor seventh chord'', is an [[anomalous saturated suspension]] in the [[9-odd-limit]].


<!-- Note: This was at one point labeled a “Swiss tetrad”, seemingly due to a mistaken identification of the “Swiss sixth chord”. [[User:Bcmills]] doesn't see how it would actually relate to the Swiss sixth, which can be represented in 5-limit JI as [[256:320:375:450]] and seems closer to a dominant seventh than a subminor one. -->
<!-- Note: This was at one point labeled a "Swiss tetrad", seemingly due to a mistaken identification of the "Swiss sixth chord". [[User:Bcmills]] doesn't see how it would actually relate to the Swiss sixth, which can be represented in 5-limit JI as [[256:320:375:450]] and seems closer to a dominant seventh than a subminor one. -->
{| class="wikitable center-all" style="column-width:10em"
{| class="wikitable center-all" style="column-width:10em"
! Ratio
! Ratio
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| colspan="4" | [[File:Swiss tetrad.mp3]]
| colspan="4" | [[File:Swiss tetrad.mp3]]
|}
|}
{{Todo|research|inline=1|text=This chord may be closely connected to 7-limit interpretations of the Blues scale.}}


{{Todo|research|inline=1|text=This chord may be closely connected to 7-limit interpretations of the Blues scale.}}
== See also ==
== See also ==
* [[14:18:21:24]]
* [[14:18:21:24]]

Latest revision as of 16:47, 20 January 2026

Chord information
Harmonics 12:14:18:21
Subharmonics 1/(21:18:14:12)
Intervals from root 1/17/63/27/4
Cents from root 267¢702¢969¢
Step intervals 7/6, 9/7, 7/6
Step cents 267¢, 435¢, 267¢
Color name zo-7 or z7
Prime limit 7
Genus 327 (63)
Intervallic odd limit 9
Otonal odd limit 21
Utonal odd limit 21
Consistent edos (d ≥ 2) 5edo*, 22edo*, 27edo*, 31edo*, …

12:14:18:21, the subminor seventh chord or septimal minor seventh chord, is an anomalous saturated suspension in the 9-odd-limit.

Ratio 1/1 7/6 3/2 7/4
Cents 0.00 266.87 701.96 968.83
Sound
[info]
Todo: research

This chord may be closely connected to 7-limit interpretations of the Blues scale.

See also