Perfect Consonances	Imperfect Consonances
Perfect Unison (P1, PP)	Minor Third (m3)
Perfect Fourth (P4)	Major Third (M3)
Perfect Fifth (P5)	Minor Sixth (m6)
Perfect Octave (P8)	Major Sixth (M6)
Diatonic Dissonances	Chromatic Dissonances
Minor Second (m2)	Augmented Second (A2, +2)
Major Second (M2)	Any Other Augmented or Diminished Interval
Minor Seventh (m7)
Major Seventh (M7)
Tritone (A4, +4, d5, °5, T, TT)