How to change audio speed without changing pitch
- Drop the file above, or choose it.
- Pick a speed, from half to double, and play it to check.
- Press the button to make the new file.
- Save it as an mp3 or wav.
How it works
The tool cuts the sound into slices about 46 milliseconds long. To speed it up, it skips a little between slices, and to slow it down, it steps back.
Each slice is nudged until its wave lines up with the one before it. That keeps the joins smooth and the pitch the same.
The preview uses your browser’s own player. The saved file is made on your device, so it can sound a tiny bit different.
Tips for a clear result
- Try a short bit first. Play a few lines in the preview before you save the whole file.
- Speech holds up best. Voices sound natural up to about 1.5×. Busy music can sound a little smeared at big changes.
- Cut what you don’t need. The audio trimmer takes off the start and the end first.
- Take out noise first. A fan or hum changes speed along with the voice. The noise remover takes it out.
- Rather read it? Audio to text turns a lecture or voice note into text.