9/5 - Revision history

Sintel: dubious

2026-06-07T14:15:39Z

dubious

← Older revision		Revision as of 14:15, 7 June 2026
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	'''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.		'''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 North American 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.		Coincidentally, the ratio between a common "alternative" tuning frequency (A432) and the most common North American 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.{{dubious}}
	== Approximation ==		== Approximation ==
	{{Interval edo approximation\|9/5}}		{{Interval edo approximation\|9/5}}

Lucius Chiaraviglio: A very large part of the world outside of North America is on 50 Hz power instead of 60 Hz.

2026-06-06T06:45:02Z

A very large part of the world outside of North America is on 50 Hz power instead of 60 Hz.

← Older revision		Revision as of 06:45, 6 June 2026
Line 8:		Line 8:
	'''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.		'''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.		Coincidentally, the ratio between a common "alternative" tuning frequency (A432) and the most common North American 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.
	== Approximation ==		== Approximation ==
	{{Interval edo approximation\|9/5}}		{{Interval edo approximation\|9/5}}

FloraC: Text replacement - " {{Interval_Edo_Approximation | " to "{{Interval edo approximation|"

2025-11-03T13:04:53Z

Text replacement - " {{Interval_Edo_Approximation | " to "{{Interval edo approximation|"

← Older revision		Revision as of 13:04, 3 November 2025
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	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.		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.
	== Approximation ==		== Approximation ==
	{{~~Interval_Edo_Approximation~~ \| 9/5}}		{{Interval edo approximation\|9/5}}

	== See also ==		== See also ==

Pailiaq at 07:45, 3 November 2025

2025-11-03T07:45:59Z

← Older revision		Revision as of 07:45, 3 November 2025
Line 9:		Line 9:

	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.		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.
			== Approximation ==
			{{Interval_Edo_Approximation \| 9/5}}

	== See also ==		== See also ==

BudjarnLambeth: /* See also */ link

2024-10-27T00:00:38Z

FloraC: Recategorize

2024-09-30T08:39:25Z

Recategorize

← Older revision		Revision as of 08:39, 30 September 2024
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	[[Category:Seventh]]		[[Category:Seventh]]
	[[Category:Minor seventh]]		[[Category:Minor seventh]]
	[[Category:Over-5]]		[[Category:Over-5 intervals]]

FloraC: Reference moved

2023-08-15T10:33:05Z

Reference moved

← Older revision		Revision as of 10:33, 15 August 2023
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	{{Wikipedia\|Minor seventh}}		{{Wikipedia\|Minor seventh}}

	'''9/5''', the '''just''', '''classic(al)''', or '''ptolemaic minor seventh'''<ref>For reference, see [[5/4]]. </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.		'''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.		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.

FloraC: +twelfth complement

2023-08-14T11:20:11Z

+twelfth complement

← Older revision		Revision as of 11:20, 14 August 2023
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	== See also ==		== See also ==
	* [[10/9]] – its [[octave complement]]		* [[10/9]] – its [[octave complement]]
			* [[5/3]] – its [[twelfth complement]]
	* [[Gallery of just intervals]]		* [[Gallery of just intervals]]

FloraC: Names

2023-01-12T12:33:18Z

Names

← Older revision		Revision as of 12:33, 12 January 2023
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	{{Infobox Interval		{{Infobox Interval
	\| Name = just minor seventh, classic minor seventh		\| Name = just minor seventh, classic(al) minor seventh, ptolemaic minor seventh
	\| Color name = g7, gu 7th		\| Color name = g7, gu 7th
	\| Sound = jid_9_5_pluck_adu_dr220.mp3		\| Sound = jid_9_5_pluck_adu_dr220.mp3
Line 6:		Line 6:
	{{Wikipedia\|Minor seventh}}		{{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 [[5/4]]. </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.		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.
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	* [[10/9]] – its [[octave complement]]		* [[10/9]] – its [[octave complement]]
	* [[Gallery of just intervals]]		* [[Gallery of just intervals]]

			== Notes ==
			<references/>

	[[Category:Seventh]]		[[Category:Seventh]]
	[[Category:Minor seventh]]		[[Category:Minor seventh]]
	[[Category:Over-5]]		[[Category:Over-5]]
	~~{{todo\|expand\|review interval name}}~~

Plumtree: Normalising usage of Infobox Interval

2022-10-25T17:11:13Z

Normalising usage of Infobox Interval

← Older revision		Revision as of 17:11, 25 October 2022
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	{{Infobox Interval		{{Infobox Interval
	~~\| Ratio = 9/5~~		\| Name = just minor seventh, classic minor seventh
	~~\| Monzo = 0 2 -1~~
	~~\| Cents = 1017.5963~~
	\| Name = just minor seventh, ~~<br>~~classic minor seventh
	\| Color name = g7, gu 7th		\| Color name = g7, gu 7th
	~~\| FJS name = m7<sub>5</sub>~~
	\| Sound = jid_9_5_pluck_adu_dr220.mp3		\| Sound = jid_9_5_pluck_adu_dr220.mp3
	}}		}}
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	* [[Gallery of just intervals]]		* [[Gallery of just intervals]]

	~~[[Category:5-limit]]~~
	[[Category:Seventh]]		[[Category:Seventh]]
	[[Category:Minor seventh]]		[[Category:Minor seventh]]
	[[Category:Over-5]]		[[Category:Over-5]]
	{{todo\|expand\|review interval name}}		{{todo\|expand\|review interval name}}

← Older revision		Revision as of 00:00, 27 October 2024
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	* [[10/9]] – its [[octave complement]]		* [[10/9]] – its [[octave complement]]
	* [[5/3]] – its [[twelfth complement]]		* [[5/3]] – its [[twelfth complement]]
			* [[Ed9/5]]
	* [[Gallery of just intervals]]		* [[Gallery of just intervals]]