#54 · Browser Audio Tool

Change Pitch Without Changing Tempo

Shift pitch up or down in semitones while keeping the output duration close to the original.

Load audio to pitch-shift

Choose semitones and grain size

Drop an audio file here or click to choose a supported audio file

No audio selected

Pitch shiftsemitonesGrain size

Choose an audio file to begin.

Audio is processed locally in your browser and is not uploaded.

How to use Change Pitch Without Changing Tempo

Choose an audio file.
Adjust the tool-specific controls, then select the main action button.
Review the measured result, listen to the preview, and download the new file if useful.

What this audio tool does

A granular overlap-add processor reads the source at a pitch-scaled rate while scheduling overlapping Hann-windowed grains on the original timeline.

The output frame count matches the source, so tempo and overall duration remain stable while pitch changes.

Large shifts can sound phasey, especially on dense mixes; smaller changes work best for practice and voice effects.

Supported formats and limits

Input decoding depends on Web Audio support in the current browser. Output is WAV unless this converter explicitly uses a browser-verified MediaRecorder codec.

Stage	Details
Input	Browser-decodable audio, up to 600 MB
Processing	Local Web Audio sample data
Output	New Blob with a matching MIME type

Example and practical tips

Try change pitch without changing tempo on a short copy first, listen for artifacts, and then process the full recording. Cleaner input produces easier-to-read results.

Close other audio-heavy tabs while processing.
Keep the source file until you have checked the download.
Reset before testing a different recording.

Frequently asked questions

How can pitch change without changing tempo?

Change Pitch Without Changing Tempo uses the option shown above and real decoded audio data, so the best setting depends on the recording rather than a fixed preset.

What semitone range sounds most natural?

Browser audio capabilities vary. The page checks the required decoder or encoder and shows a specific error when it is unavailable.

Why does granular pitch shifting sound phasey?

The calculation is based on samples from the selected or recorded audio, not on the filename or a simulated result.

Will the output length match the original?

Processing stays in this browser tab. Object URLs and decoded buffers are released when you reset or leave the page.

Can I pitch-shift stereo audio locally?

Use a clean source, preview the result, and adjust the available controls if the first pass is not a good fit.

Related audio tools

Audio Speed Changer Audio Pitch Changer Change Audio Tempo Change Speed Without Changing Pitch

Processing details

Privacy	Local browser processing
Core method	The output frame count matches the source, so tempo and overall duration remain stable while pitch changes.
Priority	B

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