Requirements for an imperfect authentic cadence (IAC): - Both chords are in root position. - The soprano ends on *mi* ($\hat{3}$) or—less frequently—on *sol* ($\hat{5}$). **Example 1.** Imperfect authentic cadence (IAC) on $\hat{3}$. ![[example imperfect authentic cadence scale degree 3 satb style.png]] ![[example imperfect authentic cadence scale degree 3 satb style.mp3]] **Example 2.** Imperfect authentic cadence (IAC) on $\hat{5}$. ![[example imperfect authentic cadence scale degree 5 satb style.png]] ![[example imperfect authentic cadence scale degree 5 satb style.mp3]]