This Chapter examines the ways Prospero vocally projects his authority in The Tempest, either on his own or in conjunction with other entities. It unpacks the vast range of vocal tricks Prospero uses to gain and wield power over others, especially his disgruntled slave, Caliban. Drawing on the work of Jennifer Lynn Stoever, it shows how Prospero imposes and enforces a “sonic color line” that punishes Caliban’s vocal difference in a way that enacts racial oppression through the ear. To the degree that it does this, the play chillingly anticipates racialized listening practices that remain with us today. Nevertheless, the play’s conclusion gives us reason to believe that Prospero perhaps comes to recognize, regret, and even repent of his vocal tyranny. Though the drama stops short of enacting a truly ethical dialogue, this possibility calls out to us, albeit faintly, at the end of the play.