Actor Buster Keaton listened to recordings of his own voice in the late 1920s to ensure his natural speaking voice aligned with his established “Great Stone Face” persona for the upcoming transition to “talkies.” The advent of synchronized sound posed a major threat to silent film stars because audiences often had a preconceived notion of what a star should sound like.
Keaton wanted to confirm that his voice which turned out to be deep, slightly Midwestern, and gravelly matched the stoic, uncommunicative character he had spent a decade building. Early sound technology (like Vitaphone) was primitive and could distort certain tones or pitches; Keaton, being fascinated by the mechanical aspects of filmmaking, tested how his voice would actually register on the equipment.
Unlike many peers who struggled with the shift, Keaton’s voice was deemed “perfectly acceptable” because its flat, serious tone mirrored his deadpan facial expressions. His first feature-length talking film, Free and Easy (1930), eventually proved that his voice was well-suited for sound, though his career later suffered due to a loss of creative control at MGM rather than vocal failure.