Scales

Scales can be instantiated as s=Scale(root=’C’, mode=’ion’) or Scale(‘C hm’). Attributes ———-

	code	output
Root	Scale(‘D# min’).root	Note(‘D♯’)
Mode	Scale(‘D# min’).mode	‘Aeo’
Name	Scale(‘D# min’).name	‘D♯ Aeo’

Hint

A good way to remember modes order is the mnemonic “(I) (D)on’t (P)articularly (L)ike (M)odes (A) (L)ot”

Basic operations

	code	output
Notes	Scale(‘C’).notes()	[C, D, E, F, G, A, B]
Transposition	(Scale(‘C’)+3).notes()	[D♯, F, G, G♯, A♯, C, D]
Comparison	Scale(‘C’)== Scale(‘D’)	False
Diatonic Chords	Scale(‘C’).chords()	[CM7, Dm7, Em7…]
Roman Notation	Scale(‘C’).chordsRoman()	[‘IM7’, ‘iim7’, ‘iiim7’…]
Degrees Quality	Scale(‘C’).degreesQuality()	[‘maj’, ‘min’, ‘min’…]
Check if a chord is diatonic	Scale(‘C’).hasChord(‘Cm’)	False, or degree if in scale
Intervals	Scale(‘C’).intervals()	[2, 2, 1, 2, 2, 2, 1] in semitones
Intervals (strings)	Scale(‘C’).intervals(asStr=True)	‘w-w-h-w-w-w-h’
Parallel minor	Scale(‘C’).parallelMinor()	C Aeo | C D D♯ F G G♯ A♯
Parallel modes	Scale(‘C’).parallelModes()	[C Dor, C Phr, C Lyd…]
RelativeMinor	Scale(‘C’).relativeMinor()	A Aeo | A B C D E F G
RelativeMajor	Scale(‘C Aeo’).relativeMajor()	D♯ Ion | D♯ F G G♯ A♯ C D
Plotting scale chords	Scale(‘C min’).plotChords()
RelativeModes	Scale(‘C’).relativeModes()	[D Dor, E Phr, F Lyd…]
Plotting a chord	Scale(‘C min’).plot()