Audio Speed Changer

Change playback speed or tempo without altering pitch, or shift pitch while keeping speed — with export.

Audio Speed Changer reshapes how fast a recording plays while keeping the musical pitch intact, or shifts the pitch while the tempo stays put. Load any audio file, drag the speed slider from a slow half time to a brisk double, and hear the change instantly in the preview. Because pitch and tempo are decoupled, slowing a lecture for note taking will not turn the speaker into a bass rumble, and raising the pitch of a vocal stem will not race the beat. Musicians use it to practise a solo at reduced speed, podcasters to tighten a rambling segment, and language learners to slow unfamiliar speech without distorting it. A separate pitch control gives a musical key shift in semitones when you want that instead. Everything previews live, exports to a standard audio file, and runs locally with no upload and no fee.