Audio Speed & Pitch Changer
Change audio tempo and musical pitch independently or use linked tape-style varispeed, then audition and export a local WAV.
What Is the Audio Speed & Pitch Changer?
The Audio Speed & Pitch Changer is a private local processing deck with two explicit workflows. Independent mode changes transport speed from 0.50x to 2.00x and pitch from -12 to +12 semitones separately. Linked Tape / Varispeed mode changes duration and pitch together like changing tape or record speed. It provides waveform preview, common tempo and musical-interval presets, calculated output duration, peak normalization, audition and 16-bit, 24-bit or 32-bit-float WAV output with CSV, JSON and PDF processing reports.
How It Works
Open a browser-decodable audio file, choose Independent Tempo & Pitch or Linked Tape / Varispeed, then set speed and pitch with the sliders, exact fields or presets. Render a preview and audition the result before downloading the WAV. Independent processing is intentionally described as draft quality so artifacts are not mistaken for a mastered result.
When to Use It
Use it to rehearse material at a different tempo, create reference pitches, preview tape-style effects, adjust rough podcast or voice timing and prepare editorial drafts. Exposed vocals, sharp transients, dense mixes and extreme settings can reveal time-stretch artifacts; final music, broadcast or delivery-critical work should be rendered in a professional workstation with phase-vocoder and formant controls.
Frequently Asked Questions
- Can It Change Speed Without Changing Pitch?
- Yes. Independent mode uses a bounded WSOLA-style time-domain process so the requested duration and pitch can be controlled separately.
- What Does Linked Tape / Varispeed Do?
- It changes playback rate directly. Double speed raises pitch by one octave and halves duration; half speed lowers pitch by one octave and doubles duration.
- Why Is The Download A WAV?
- WAV preserves the newly rendered samples without adding another lossy codec stage. Use Audio Converter afterward when a compressed delivery copy is needed.
- Are Audio Files Uploaded?
- No. Browser decoding, processing, waveform preview and export occur in the current tab.
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