Varispeed

Shift the speed and pitch of any audio or video in semitone steps. Tape, Tempo and Pitch modes.

Simple and effective way to listen to music sped up or slowed down in semitone increments with the highest quality. It includes 3 modes. A Tape mode, which decreases the pitch and speed together, a tempo-locked pitch transposition mode, and a pitched-locked mode which slows the track while maintaining the original pitch. The Tape mode has the highest audio quality, while the Tempo & Pitch-locked modes have implicit quality compromises due to the nature of the data loss incurred by their processes.