module Key
Public Instance Methods
degree_to_key(number)
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# File lib/kuromusic/Key.rb, line 58 def degree_to_key(number) { 0=>"C", 1=>"C#", 2=>"D", 3=>"D#", 4=>"E", 5=>"F", 6=>"F#", 7=>"G", 8=>"G#", 9=>"A", 10=>"A#", 11=>"B" }[number % 12] end
key_to_degree(key)
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# File lib/kuromusic/Key.rb, line 38 def key_to_degree(key) { #positive Key::C::NATURAL => 0, Key::B::SHARP => 0, Key::C::SHARP => 1, Key::D::FLAT => 1, Key::D::NATURAL => 2, Key::D::SHARP => 3, Key::E::FLAT => 3, Key::E::NATURAL => 4, Key::F::FLAT => 4, Key::E::SHARP => 5, Key::F::NATURAL => 5, #negative Key::C::FLAT => -1, Key::B::NATURAL => -1, Key::A::SHARP => -2, Key::B::FLAT => -2, Key::A::NATURAL => -3, Key::A::FLAT => -4, Key::G::SHARP => -4, Key::G::NATURAL => -5, Key::G::FLAT => -6, Key::F::SHARP => -6 }[key] end