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Audio Speed and Pitch Changer

Slow down, speed up, or transpose an audio reference with linked controls, then preview the change and export a local WAV.

Local resamplingSpeed and semitonesWAV export

Speed and pitch facts at a glance

This first version uses linked resampling: speed and pitch are rendered together rather than promising a phase-vocoder time stretch.

Speed
0.50x to 2.00x
Pitch
-12 to +12 semitones
Output
A locally rendered 16-bit WAV file
Privacy
Audio decoding and rendering stay in the browser

Make a useful reference adjustment

A small control surface for practice, arrangement checks, and fast ideas.

Slow down

Reduce speed to inspect a phrase or prepare a slower practice reference.

Transpose

Move the linked resampling pitch by semitones to try another key area.

Honest output

The page explains the linked mode so you can choose a phase-vocoder tool when independent control is required.

How to change audio speed and pitch

Choose the source, set two bounded controls, and review the rendered file.

  1. 01

    Open an audio file

    Select a browser-decodable source. The file is copied into local browser memory.

  2. 02

    Set speed and semitones

    Use speed for tempo and semitones for a linked pitch shift. Moderate changes usually create fewer artifacts.

  3. 03

    Render and download

    Create the WAV locally, then listen for transients, timing, and tonal artifacts before use.

Where speed and pitch changes help

Linked resampling is a practical first pass for reference work.

Practice material

Slow a phrase down for listening, transcription, or instrumental practice.

Vocal range checks

Try a reference in a nearby key before committing to a new arrangement.

Creative variations

Make a quick sped-up or slowed-down version for a video, sketch, or demo.

Know the resampling boundary

Speed and pitch are linked in this lightweight engine, so it is intentionally not a full time-stretch processor.

01

Use moderate changes

Large speed or pitch changes can introduce aliasing, softened transients, or a synthetic tone.

02

Check the new duration

The output length changes with the linked resampling ratio. Confirm it in the destination timeline.

03

Choose the right tool

For independent pitch and tempo preservation, use a dedicated phase-vocoder or DAW workflow.

Speed and pitch changer questions, answered

Direct answers about linked resampling, limits, output, and privacy.

Continue the reference workflow

Analyze or edit the adjusted file before it moves into a project.

Audio Cutter

Trim the slowed or transposed reference to one useful phrase.

BPM Detector

Estimate the new reference tempo before placing it on a grid.

Audio to MIDI Converter

Try a melodic transcription after preparing the source level and timing.

Set the reference speed

Choose a song or practice passage, set the linked speed and pitch change, then export a reference WAV.

Change speed and pitch