Audio tool

Audio Speed Changer

Speed up or slow down audio, with or without pitch change.

Free Files stay on your device
Choose an audio fileMP3, WAV, M4A, OGG · not uploaded

About this tool

Audio Speed Changer plays a file faster or slower and saves the result. Keep the pitch for podcasts and lessons, or let pitch follow speed for slowed or sped-up song edits. Your files are processed on your own device. Nothing is uploaded to our servers.

How to use Audio Speed Changer

  1. Choose an audio file.
  2. Set the speed and pitch mode, then press Preview.
  3. Save as MP3 or WAV.

Questions people ask

How much does pitch change when it follows speed?

12 × log2(speed) semitones. 2× raises pitch by one octave (12 semitones); 0.8× lowers it by about 3.9 semitones.

How long will the new file be?

The original length divided by the speed. A 3:00 song at 1.25× lasts 2:24.

Does keeping pitch affect quality?

Time-stretching can add a slight echo, mostly at extreme speeds. Speech between 0.75× and 1.5× sounds natural.

More audio tools

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Voice RecorderRecord your voice from the microphone and save it. Audio JoinerMerge several audio files into one, with optional crossfade. Reverse AudioPlay any audio file backwards and save it. Tone GeneratorPlay a sine, square or sawtooth tone at any frequency. BPM TapperFind the tempo of a song by tapping along to the beat. Video to MP3Extract the audio track from a video file as MP3.
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