Intervals	Theory Things William Wieland
½ steps (Short List) 12 P8 Perfect Octave 11 M7 Major Seventh 10 mi7 Minor Seventh 9 M6 Major Sixth 8 mi6 Minor Sixth 7 P5 Perfect Fifth 6 TT Tritone 5 P4 Perfect Fourth 4 M3 Major Third 3 mi3 Minor Third 2 M2 Major Second 1 mi2 Minor Second 0 P1 Perfect Unison	Consonances Dissonances  Perfect  P8 P5 P1    Imperfect  M6 & mi6 M3 & mi3   7ths P4 * 2nds all aug. all dim.   * above the lowest note	½ steps Augmented Seventh A7 12 P8 Perfect Octave Major Seventh M7 11 d8 Diminished Octave Minor Seventh mi7 10 A6 Augmented Sixth Diminished Seventh d7 9 M6 Major Sixth Augmented Fifth A5 8 mi6 Minor Sixth Perfect Fifth P5 7 d6 Diminished Sixth Diminished Fifth d5 6 A4 Augmented Fourth Augmented Third A3 5 P4 Perfect Fourth Major Third M3 4 d4 Diminished Fourth Minor Third mi3 3 A2 Augmented Second Diminished Third d3 2 M2 Major Second Augmented Unison A1 1 mi2 Minor Second Perfect Unison P1 0 d2 Diminished Second