Just intonation point: Difference between revisions

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'''JIP''' ('''just intonation point'''), or commonly denoted "J", is a point in ''p''-limit [[Vals and tuning space|tuning space]] which represents ~~pure~~ ''p''-limit JI. Specifically, it is equal to {{val|log22 log23 log25 … log2''p''}}. If M is a monzo, then <J|M> is M evaluated in terms of octaves. If we shift to weighted coordinates, so that M = {{monzo|''m''2 ''m''3 ''m''5 … ''m''''p''}} is represented by the ket vector {{monzo|e2log22 e3log23 e5log25 … e''p''log2''p''}}, then J becomes correspondingly the bra vector {{val|1 1 1 … 1}}.

'''JIP''' ('''just intonation point'''), or commonly denoted "J", is a point in ''p''-limit [[Vals and tuning space|tuning space]] which represents untempered ''p''-limit JI. Specifically, it is equal to {{val|log22 log23 log25 … log2''p''}}. If M is a monzo, then <J|M> is M evaluated in terms of octaves. If we shift to weighted coordinates, so that M = {{monzo|''m''2 ''m''3 ''m''5 … ''m''''p''}} is represented by the ket vector {{monzo|e2log22 e3log23 e5log25 … e''p''log2''p''}}, then J becomes correspondingly the bra vector {{val|1 1 1 … 1}}.

As seen in the 5-limit [[projective tuning space]] diagram, it is the red hexagram in the center.

Revision as of 22:23, 6 May 2021 view source Inthar (talk \| contribs) autopatrolled, emailconfirmed 15,004 edits Clarify interpretation of the JI point ← Older edit		Revision as of 22:24, 6 May 2021 view source Inthar (talk \| contribs) autopatrolled, emailconfirmed 15,004 edits No edit summary Newer edit →
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	'''JIP''' ('''just intonation point'''), or commonly denoted "J", is a point in ''p''-limit [[Vals and tuning space\|tuning space]] which represents ~~pure~~ ''p''-limit JI. Specifically, it is equal to {{val\|log<sub>2</sub>2 log<sub>2</sub>3 log<sub>2</sub>5 … log<sub>2</sub>''p''}}. If M is a monzo, then <J\|M> is M evaluated in terms of octaves. If we shift to weighted coordinates, so that M = {{monzo\|''m''<sub>2</sub> ''m''<sub>3</sub> ''m''<sub>5</sub> … ''m''<sub>''p''</sub>}} is represented by the ket vector {{monzo\|e<sub>2</sub>log<sub>2</sub>2 e<sub>3</sub>log<sub>2</sub>3 e<sub>5</sub>log<sub>2</sub>5 … e<sub>''p''</sub>log<sub>2</sub>''p''}}, then J becomes correspondingly the bra vector {{val\|1 1 1 … 1}}.		'''JIP''' ('''just intonation point'''), or commonly denoted "J", is a point in ''p''-limit [[Vals and tuning space\|tuning space]] which represents untempered ''p''-limit JI. Specifically, it is equal to {{val\|log<sub>2</sub>2 log<sub>2</sub>3 log<sub>2</sub>5 … log<sub>2</sub>''p''}}. If M is a monzo, then <J\|M> is M evaluated in terms of octaves. If we shift to weighted coordinates, so that M = {{monzo\|''m''<sub>2</sub> ''m''<sub>3</sub> ''m''<sub>5</sub> … ''m''<sub>''p''</sub>}} is represented by the ket vector {{monzo\|e<sub>2</sub>log<sub>2</sub>2 e<sub>3</sub>log<sub>2</sub>3 e<sub>5</sub>log<sub>2</sub>5 … e<sub>''p''</sub>log<sub>2</sub>''p''}}, then J becomes correspondingly the bra vector {{val\|1 1 1 … 1}}.

	As seen in the 5-limit [[projective tuning space]] diagram, it is the red hexagram in the center.		As seen in the 5-limit [[projective tuning space]] diagram, it is the red hexagram in the center.