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Contents
# frozen_string_literal: true
module Coltrane
# It describes a pitch, like E4 or Bb5. It's like a note, but it has an octave
class Pitch
attr_reader :number
def initialize(pitch)
case pitch
when String then @number = number_from_name(pitch)
when Numeric then @number = pitch
when Pitch then @number = pitch.number
end
end
def number_from_name(pitch_string)
_, note, octaves = pitch_string.match(/(.*)(\d)/).to_a
Note[note].number + 12 * octaves.to_i
end
def name
"#{note.name}#{octave}"
end
def octave
number / 12
end
def note
Note[number]
end
def +(other)
Pitch.new(number + (other.is_a?(Pitch) ? other.number : other))
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems