12:14:18:21: Difference between revisions

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~~The~~ '''~~swiss tetrad~~''' ~~is a just 7-prime-limit~~, ~~9-odd-limit~~ chord ~~which~~ is an ~~ASS, or~~ [[~~Dyadic chord#Anomalous Saturated Suspensions|~~anomalous saturated suspension]]~~. In close position, it is~~ [[~~unison|1]]~~-~~[[7/6]]~~-~~[[3/2]]-[[7/4~~]]~~, with steps 7/6-9/7-7/6-8/7. Tempered versions of it have been called "subminor seventh chords" or "swiss sixth chords", so "swiss tetrad" splits the difference~~.

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

{| class="wikitable center-all" style="column-width:10em"

! Ratio

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| 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.}}

== See also ==

* [[14:18:21:24]]

~~[[Category:Dyadic chords]]~~

~~[[Category:7-limit]]~~

~~[[Category:9-odd-limit]]~~

~~[[Category:Tetrads]]~~

[[Category:Listen]]

[[Category:Minor seventh chords|##]]

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-The '''swiss tetrad''' is a just 7-prime-limit, 9-odd-limit chord which is an ASS, or [[Dyadic chord#Anomalous Saturated Suspensions|anomalous saturated suspension]]. In close position, it is [[unison|1]]-[[7/6]]-[[3/2]]-[[7/4]], with steps 7/6-9/7-7/6-8/7. Tempered versions of it have been called "subminor seventh chords" or "swiss sixth chords", so "swiss tetrad" splits the difference.
+{{Infobox Chord|ColorName=zo-7 or z7}}
+'''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. -->
 {| class="wikitable center-all" style="column-width:10em"
 ! Ratio
@@ Line 11: / Line 13: @@
 | 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.}}
+== See also ==
+* [[14:18:21:24]]
-[[Category:Dyadic chords]]
-[[Category:7-limit]]
-[[Category:9-odd-limit]]
-[[Category:Tetrads]]
 [[Category:Listen]]
+[[Category:Minor seventh chords|##]]