Harmonic Cadences

The last two different chords at a cadence

Perfect Authentic Cadence (PAC)
  • V-I
  • Both triads in root position
  • Root in Soprano of I
 Perfect Plagal Cadence (PPC)
  • IV-I
  • Both triads in root position
  • Root in Soprano of I
Imperfect Authentic Cadence (IAC)
  • V-I
  • One or both chords in inversion
  • and/or
  • 3rd or 5th in Soprano of I
  • or viio substituted for V
 Imperfect Plagal Cadence (IPC)
  • IV-I
  • One or both chords in inversion
  • and/or
  • 3rd or 5th in Soprano of I
Half Cadence (HC)
  • Any cadence that ends on V
  • Phrygian is iv6-V
 Deceptive Cadence
  • Ti-Do in melody (as in V-I)
  • V-vi
  • vi replaces I