User:Zhenlige/Chromatic notation

This page introduces a proposed notation system centering the 5L 7s chromatic scale. For the meantone chromatic scale 7L 5s, there are two approches to use this system, just like using the standard notation system for the antidiatonic scale.

Intervals

The names according to quasi-diatonic MOS notation are not intuitional, so different names are given here. “Sem” stands for “semitone”.

Interval	Abbrev.	Steps		29edo tuning (steps)	Equivalent diatonic interval
		L	s
Perfect (chroma-)unison/zero-sem	PU	0	0	0	P1
Minor semitone/monosem/1-sem	ms / m1s	0	1	2	m2
Major semitone/monosem/1-sem	Ms / M1s	1	0	3	A1
Minor tone/disem/2-sem	mT / m2s	0	2	4	d3
Major tone/disem/2-sem	MT / M2s	1	1	5	M2
Minor sesquitone/trisem/3-sem	mS / m3s	1	2	7	m3
Major sesquitone/trisem/3-sem	MS / M3s	2	1	8	A2
Minor ditone/tetrasem/4-sem	m2T / m4s	1	3	9	d4
Major ditone/tetrasem/4-sem	M2T / M4s	2	2	10	M3
Perfect fourth/pentasem/5-sem	Pf / P5s	2	3	12	P4
Augmented fourth/pentasem/5-sem	Af / A5s	3	2	13	A3
Minor tritone/hexasem/6-sem	m3T / m6s	2	4	14	d5
Major tritone/hexasem/6-sem	M3T / M6s	3	3	15	A4
Diminished fifth/heptasem/7-sem	dF / d7s	2	5	16	d6
Perfect fifth/heptasem/7-sem	PF / P7s	3	4	17	P5
Minor tetratone/octasem/8-sem	m4T / m8s	3	5	19	m6
Major tetratone/octasem/8-sem	M4T / M8s	4	4	20	A5
Minor nonasem/9-sem	m9s	3	6	21	d7
Major nonasem/9-sem	M9s	4	5	22	M6
Minor pentatone/decasem/10-sem	m5T / m10s	4	6	24	m7
Major pentatone/decasem/10-sem	M5T / M10s	5	5	25	A6
Minor undecasem/11-sem	m11s	4	7	26	d8
Major undecasem/11-sem	M11s	5	6	27	M7
Perfect octave/hexatone/dodecasem/12-sem	P6T / P12s	5	7	29	P8

Note names

Latin letters ABCDEFG and Greek letters αβγδε are used. Latin letters represent the same notes as diatonic. Each Greek letter represents the note a chroma below the note marked with the corresponding Latin letter. Ups and downs are used for altering Pythagorean commas.

Chromatic	Diatonic
D	D
ε	E♭
↑ε	D♯
E	E
F	F
γ	G♭
↑γ	F♯
G	G
α	A♭
↑α	G♯
A	A
β	B♭
↑β	A♯
B	B
C	C
δ	D♭
↑δ	C♯
D	D