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# frozen_string_literal: true
module Coltrane
module Theory
# This class describes an actual implementation of a Chord, being aware
# of exact octaves of each pitch and even repeating pitches across octaves.
class Voicing
attr_reader :pitches
def initialize(*pitch_strings, pitches: nil)
@pitches = begin
if pitch_strings.any?
pitch_strings.map { |s| Pitch[s] }
elsif pitches
pitches
else
raise WrongArgumentsError
end
end.sort
end
def self.[](*args)
new(*args)
end
def pitch_classes
NoteSet[*pitches.map(&:pitch_class).uniq]
end
alias notes pitch_classes
def chord
@chord ||= Chord.new(notes: notes)
rescue ChordNotFoundError
return false
end
def frequencies
@frequencies ||= pitches.map(&:frequency)
end
def discontinuity
frequencies.each_with_index.reduce(0) do |max_dist, (freq, index)|
next 0 if index.zero?
[max_dist, freq.to_f - frequencies[index - 1].to_f].max
end
end
private
def ideal_frequency_distance
(Pitch['D3'].frequency - Pitch['A2'].frequency).to_f
end
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems