Speed up or slow down any audio file. Our AI keeps the pitch exactly the same — no "chipmunk" effect, no "slow-motion" voice, just a different speed.
A speed changer alters how fast a track plays — measured as a percentage of the original speed — without touching its pitch. This is different from simply speeding up or slowing down a tape or video, which changes the pitch along with the speed (the classic "chipmunk" or "slow-motion" effect).
Our speed changer uses time-stretching, the same technology behind professional DJ and production tools, so the key of the music stays exactly where it started — only the tempo changes.
Your audio, played back at the exact speed you chose, same pitch, ready to download as MP3.
Slow down a tricky passage to learn it note by note, then speed it back up as you improve.
Practice choreography at a slower tempo before performing at full speed.
Nudge a track's tempo to match another one before beatmatching.
Speed up a recording to get through it faster without the pitch getting weird.
Pick how much faster or slower, from −50% to +100%.
Drag your audio file into the box above. Supports MP3, WAV, FLAC, M4A and more.
Download the speed-adjusted MP3 — new tempo, same key.