Imperfect Authentic Cadence

Definition

An Imperfect Authentic Cadence is similar to a Perfect Authentic Cadence but with one small difference - instead of ending on the tonic chord (I), it ends on another chord within the key, such as IV or vi.

Related terms

Plagal Cadence: As mentioned earlier, a Plagal Cadence also provides a sense of resolution but does so using different chords than both Perfect and Imperfect Authentic Cadences.

Deceptive Cadence: Just like with Perfect Authentic Cadences, an Imperfect Authentic Cadence can also be followed by a Deceptive Cadence, where the expected resolution is subverted.

Half Cadence: Similar to both Perfect and Imperfect Authentic Cadences, a Half Cadence can be used as a transitional phrase before reaching a more conclusive ending.