Sha256: 2b74489d65beeff9b547dcedd400e482451a42dcb2c2c7d1df1388d26cd8f052
Contents?: true
Size: 778 Bytes
Versions: 22
Compression:
Stored size: 778 Bytes
Contents
# frozen_string_literal: true
module Coltrane
module Theory
class DiatonicScale < Scale
def initialize(tone, major: true)
@major = major
tone = Note[tone]
notes = CircleOfFifths.new(tone - (major? ? 0 : 9), 7).notes.sort
super notes: notes.rotate(notes.index(tone))
end
def name
major? ? 'Major' : 'Natural Minor'
end
def relative_minor
minor? ? self : self.class.new(@tone + 9, major: false)
end
def relative_major
major? ? self : self.class.new(@tone - 9, major: true)
end
def relative
major? ? relative_minor : relative_major
end
def major?
!!@major
end
def minor?
!@major
end
end
end
end
Version data entries
22 entries across 22 versions & 1 rubygems