9/5: Difference between revisions

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{{Infobox Interval

~~| Icon =~~

| Name = just minor seventh, classic(al) minor seventh, ptolemaic minor seventh

~~| Ratio = 9/5~~

~~| Monzo = 0 2 -1~~

~~| Cents = 1017.5963~~

| Name = just minor seventh

| Color name = g7, gu 7th

| Sound = jid_9_5_pluck_adu_dr220.mp3

}}

'''9/5''' is a treated as a consonance in [[5-limit]] just intonation, forming a part of such chords such as the 1-6/5-3/2-9/5 minor seventh chord, and the supermajor tetrad, 1-9/7-3/2-9/5 in the 7-limit.

'''9/5''', the '''just''', '''classic(al)''', or '''ptolemaic minor seventh'''<ref>For reference, see [[5-limit]]. </ref> is often treated as a consonance in [[5-limit]] [[just intonation]], forming a part of such chords such as the 1-6/5-3/2-9/5 minor seventh chord, and the supermajor tetrad, 1-9/7-3/2-9/5 in the 7-limit.

Coincidentally, the ratio between a common "alternative" tuning frequency (A432) and the most common AC electrical frequency (60hz) is exactly 36/5, two octaves above 9/5. This is notably a more consonant interval than the 11/6 formed by the more common tuning frequency of A440, which may lead to a noticeable improvement in consonance when electrically powered instruments or amplifiers are interfered with by AC power.

== See also ==

* [[~~Gallery of Just Intervals~~]]

* [[10/9]] – its [[octave complement]]

* [~~https:~~//~~en.wikipedia.org/wiki~~/~~Minor_seventh Minor seventh - Wikipedia]~~

* [[5/3]] – its [[twelfth complement]]

* [[Ed9/5]]

* [[Gallery of just intervals]]

== Notes ==

~~[[Category:5-limit]]~~

~~[[Category:Interval]]~~

~~[[Category:Ratio]]~~

~~[[Category:Just interval]]~~

[[Category:Seventh]]

[[Category:Minor seventh]]

[[Category:Over-5]]

[[Category:Over-5 intervals]]

~~[[Category:todo:expand]]~~

~~[[Category:todo:review interval name~~]]

@@ Line 1: / Line 1: @@
 {{Infobox Interval
-| Icon =
+| Name = just minor seventh, classic(al) minor seventh, ptolemaic minor seventh
-| Ratio = 9/5
-| Monzo = 0 2 -1
-| Cents = 1017.5963
-| Name = just minor seventh
 | Color name = g7, gu 7th
 | Sound = jid_9_5_pluck_adu_dr220.mp3
 }}
+{{Wikipedia|Minor seventh}}
-'''9/5''' is a treated as a consonance in [[5-limit]] just intonation, forming a part of such chords such as the 1-6/5-3/2-9/5 minor seventh chord, and the supermajor tetrad, 1-9/7-3/2-9/5 in the 7-limit.
+'''9/5''', the '''just''', '''classic(al)''', or '''ptolemaic minor seventh'''<ref>For reference, see [[5-limit]]. </ref> is often treated as a consonance in [[5-limit]] [[just intonation]], forming a part of such chords such as the 1-6/5-3/2-9/5 minor seventh chord, and the supermajor tetrad, 1-9/7-3/2-9/5 in the 7-limit.
 Coincidentally, the ratio between a common "alternative" tuning frequency (A432) and the most common AC electrical frequency (60hz) is exactly 36/5, two octaves above 9/5. This is notably a more consonant interval than the 11/6 formed by the more common tuning frequency of A440, which may lead to a noticeable improvement in consonance when electrically powered instruments or amplifiers are interfered with by AC power.
 == See also ==
-* [[Gallery of Just Intervals]]
+* [[10/9]] – its [[octave complement]]
-* [https://en.wikipedia.org/wiki/Minor_seventh Minor seventh - Wikipedia]
+* [[5/3]] – its [[twelfth complement]]
+* [[Ed9/5]]
+* [[Gallery of just intervals]]
+== Notes ==
+<references/>
-[[Category:5-limit]]
-[[Category:Interval]]
-[[Category:Ratio]]
-[[Category:Just interval]]
 [[Category:Seventh]]
 [[Category:Minor seventh]]
-[[Category:Over-5]]
+[[Category:Over-5 intervals]]
-[[Category:todo:expand]]
-[[Category:todo:review interval name]]