Audio speed changer

Resample audio 0.25–4× with pitch following tempo (tape-style) and download the result as a WAV.

Resampled in this browser. Nothing is sent anywhere.

Tape-style speed change: pitch follows tempo (2× plays an octave up). Decodes with Web Audio and exports uncompressed 16-bit WAV — no pitch-preserving time-stretch. Files up to 200 MB that decode within a 256 MB PCM budget (about 12 min stereo at 44.1 kHz); slowed output is held to the same budget.

How to use

  1. Choose an audio file.
  2. Set the speed factor.
  3. Export and download the WAV.

What it supports

Linear-interpolation resampling: faster is higher-pitched, slower is lower — there is no pitch-preserving time-stretch. Decodes via Web Audio, exports 16-bit WAV. Files up to 200 MB that decode within a 256 MB PCM budget (about 12 min stereo at 44.1 kHz); slowed-down output is held to the same budget.

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