Kite's ups and downs notation: Difference between revisions

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=== Harmonic and subharmonic chords ===

A chord which is the nearest approximation of a harmonic or subharmonic chord can be named using har or sub, words borrowed from [[Kite's color notation#Chord names|color notation]].

The [[4:5:6:7|4:5:6:7 chord]] is called the har7 ("har-seven") or h7 chord, because it's part of the harmonic series. [[4:5:6:7:9|Ch9]] = 4:5:6:7:9 and [[4:5:6:7:9:11|Ch11]] = 4:5:6:7:9:11. The [[60:70:84:105|sub7 ("sub-seven") or s7 chord]] 7:6:5:4 is part of the subharmonic series. It's the first 7 subharmonics, with the 7th subharmonic becoming the root. [[140:180:210:252:315|Cs9]] = 9:7:6:5:4 and Cs11 = 11:9:7:6:5:4. Note that s9 is not s7 plus a 9th, but a completely different chord. Usually the 9th ''ascends'' from the root, but in a sub9 chord it ''descends'' from the top note, and becomes the new root. Thus the s7 chord is contained in the ''upper'' four notes of the s9 chord, not the lower four. See [[Kite's thoughts on harmonic and subharmonic nomenclature]].

Cs6 = [[70:84:105:120|12:10:8:7]]. Ch6 = 6:7:9:10. Other than these two chords, all harmonic/subharmonic numbers must be odd, e.g. Ch8 is invalid. For any odd number N greater than 5, ChN is 1:3:5...N and CsN is N...5:3:1 (but 1 and 3 are generally written as their octave equivalents 4 and 6). Additions, alterations and omissions refer to degrees, not harmonics or subharmonics: Ch7,11 adds 8/3, not 11/4. Ch9no5 omits 3/2, not 5/4. However, all numbers greater than 13 refer to (sub)harmonics, e.g. Ch9,15 adds 15/8 and Ch19no15 omits it.

Naming edo chords this way is a slight misnomer, because the chords are not actually JI chords. If the nearest direct and indirect approximations of a harmonic don't match, har and sub are not recommended. For example, 20edo's 9th harmonic maps directly to 3\20 but indirectly to 4\20 (via the 3rd harmonic 12\20). Thus a 20edo har9 chord is somewhat ambiguous. However 20edo's har7, har11no9, etc. are not.

=== Rules for punctuation usage ===

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+=== Harmonic and subharmonic chords ===
+A chord which is the nearest approximation of a harmonic or subharmonic chord can be named using har or sub, words borrowed from [[Kite's color notation#Chord names|color notation]].
+The [[4:5:6:7|4:5:6:7 chord]] is called the har7 ("har-seven") or h7 chord, because it's part of the harmonic series. [[4:5:6:7:9|Ch9]] = 4:5:6:7:9 and [[4:5:6:7:9:11|Ch11]] = 4:5:6:7:9:11. The [[60:70:84:105|sub7 ("sub-seven") or s7 chord]] 7:6:5:4 is part of the subharmonic series. It's the first 7 subharmonics, with the 7th subharmonic becoming the root. [[140:180:210:252:315|Cs9]] = 9:7:6:5:4 and Cs11 = 11:9:7:6:5:4. Note that s9 is not s7 plus a 9th, but a completely different chord. Usually the 9th ''ascends'' from the root, but in a sub9 chord it ''descends'' from the top note, and becomes the new root. Thus the s7 chord is contained in the ''upper'' four notes of the s9 chord, not the lower four. See [[Kite's thoughts on harmonic and subharmonic nomenclature]].
+Cs6 = [[70:84:105:120|12:10:8:7]]. Ch6 = 6:7:9:10. Other than these two chords, all harmonic/subharmonic numbers must be odd, e.g. Ch8 is invalid. For any odd number N greater than 5, ChN is 1:3:5...N and CsN is N...5:3:1 (but 1 and 3 are generally written as their octave equivalents 4 and 6). Additions, alterations and omissions refer to degrees, not harmonics or subharmonics: Ch7,11 adds 8/3, not 11/4. Ch9no5 omits 3/2, not 5/4. However, all numbers greater than 13 refer to (sub)harmonics, e.g. Ch9,15 adds 15/8 and Ch19no15 omits it.
+Naming edo chords this way is a slight misnomer, because the chords are not actually JI chords. If the nearest direct and indirect approximations of a harmonic don't match, har and sub are not recommended. For example, 20edo's 9th harmonic maps directly to 3\20 but indirectly to 4\20 (via the 3rd harmonic 12\20). Thus a 20edo har9 chord is somewhat ambiguous. However 20edo's har7, har11no9, etc. are not.
 === Rules for punctuation usage ===