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Contents
# frozen_string_literal: true
module Coltrane
module Theory
# This module takes care of adding to progressions knowledge that is more
# based on common standards and practices.
module NotableProgressions
PROGRESSIONS = {
'Pop' => ['I-V-vi-IV', :major],
'Jazzy Pop' => ['IM7-V7-vi7-IVM7', :major],
'Jazz' => ['ii7-V7-I7', :major],
'Jazz Minor' => ['ii7-V7-i7', :major],
'Blues' => ['IM7-IV7-I7-V7-IV7-I7', :major],
'Jazz Blues' => ['I7-IV7-I7-V7-IV7-I7', :major],
'Fifties' => ['I-vi-IV-V', :major],
'Circle' => ['vi-ii-V-I', :major],
'Tune Up' => ['ii7-V7-IM7-i7-IV7-IVM7-VIIM7', :minor]
}.freeze
PROGRESSIONS.each do |name, values|
notation, scale_name = values
define_method name.underscore do |note|
note = note.is_a?(Note) ? note : Note[note]
scale = Scale.public_send(scale_name, note)
new(notation, scale: scale)
end
end
end
end
end
Version data entries
20 entries across 20 versions & 1 rubygems