Pitch Shifter Online — Change the Key of Any Song
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What is Pitch Shifting?
Pitch shifting changes the musical key of an audio file — making it higher or lower without affecting the speed or duration. Musicians use it to transpose songs to a comfortable singing range, DJs use it for key matching between tracks, and creators use it for vocal effects.
Our pitch shifter uses a phase vocoder algorithm to shift pitch independently of speed. Pick a preset or use the slider for precise control over semitones. If you want the classic tape-speed effect where pitch and speed change together, try our Slowed + Reverb tool.
How to Change the Pitch of a Song
- Upload your audio — drop an MP3, WAV, OGG, FLAC, or M4A file (up to 50 MB).
- Choose your pitch shift — pick a preset like One Octave Down (-12) or One Octave Up (+12), or dial in the exact semitones with the slider.
- Preview and export — hit play to hear the pitch shift live, then export as a 320 kbps MP3.
Change Pitch Without Changing Speed
Our pitch shifter preserves the original speed and duration — only the musical key changes. Whether you shift up by 2 semitones or a full octave, the audio stays the same length and tempo. This is achieved using a phase vocoder algorithm that decouples pitch from playback speed.
This makes it ideal for transposing backing tracks to match your vocal range, key-matching DJ mixes, or experimenting with how a song sounds in a different key — all without the chipmunk or slowdown effects you get from simple resampling. For the classic tape-speed effect, try Slowed + Reverb.
Best For
Singers transposing karaoke tracks to their vocal range without changing the tempo. DJs matching keys between tracks for smoother mixes. Music producers experimenting with pitch-shifted samples. Guitar players transposing songs to alternate tunings. Anyone who wants to hear what a song sounds like in a different key — at the original speed.
Frequently Asked Questions
Does changing pitch also change the speed?
No. Our pitch shifter uses a phase vocoder algorithm to shift pitch independently of speed. Your audio stays the same duration regardless of how many semitones you shift.
Can I change pitch without changing speed?
Yes — that's exactly what this tool does. The phase vocoder algorithm shifts pitch while preserving the original tempo and duration.
What is a semitone?
A semitone is the smallest interval in Western music. There are 12 semitones in one octave. Moving up 2 semitones is like going from C to D on a piano. Our presets range from -12 (one full octave down) to +12 (one full octave up).
Can I transpose a song to a different key?
Yes. Each semitone shift moves the entire song up or down by one musical key. For example, +2 semitones transposes from C major to D major. The speed and duration stay the same, so the song sounds natural in the new key.
What audio formats are supported?
MP3, WAV, OGG, FLAC, M4A, AAC, and WebM. The output is always a 320 kbps MP3 file.
Is my audio uploaded to a server?
No. All processing happens locally in your browser using the Web Audio API. Your files never leave your device.
How good is the audio processing quality?
We use the same techniques found in professional audio software: convolution reverb with real impulse responses, phase vocoder time-stretching, HRTF-based spatial audio, EBU R128 peak limiting, and LUFS loudness normalization. What you hear in the preview is exactly what you get in the export — we guarantee preview/export parity across every tool.