Audio Pitch Changer
Transpose a song to a key that suits your voice or instrument, tune a recording to match others, or change a voice for fun, all without speeding it up or slowing it down.
- Files stay on your device
- No sign-up
- Free to use
Pitch
Output
Processing happens on your device; your audio is not uploaded.
How to use Audio Pitch Changer
- Drop an audio file onto the upload area.
- Choose the shift in semitones with the slider or the buttons; use Fine tune for small corrections in cents.
- Read the summary to see which key a song in C would move to.
- Select Change pitch and download the result.
Audio Pitch Changer features
±12 semitones
Shift up or down by up to an octave in musical steps.
Fine tuning in cents
Adjust by hundredths of a semitone to match an instrument or a recording made at a different tuning.
Speed unchanged
The pitch is shifted and the original tempo restored, so the length stays the same.
Key guide
See what key a song in C would end up in after the shift.
Format choice
Keep the original format or save as MP3, M4A or WAV.
Private
Processed with FFmpeg in your browser.
When to use Audio Pitch Changer
- Transposing a backing track to a comfortable singing key.
- Matching a recording to an instrument tuned slightly sharp or flat.
- Practising songs in a guitar-friendly key.
- Creating deeper or higher voice effects for videos.
- Correcting recordings made with a tape or turntable at the wrong speed.
Audio Pitch Changer FAQ
What is a semitone?
The smallest step in Western music, the distance between neighbouring piano keys. Twelve semitones make an octave, which doubles or halves the frequency.
Will the song speed up when I raise the pitch?
No. The pitch is changed and the speed is then corrected, so the duration stays the same. For tape-style changes, use the Audio Speed Changer with pitch preservation turned off.
Why does a large shift sound artificial?
Shifting voices by many semitones changes their character, because formants, the resonances that make a voice recognisable, move too. Small shifts of one to three semitones sound most natural.
What are cents for?
A cent is one hundredth of a semitone. Older recordings and some instruments are tuned slightly away from A = 440 Hz; fine tuning by a few cents lines them up.
Can I change the key of a video’s music?
Extract the audio from the video first, change its pitch here, then add it back with a video editor.
How pitch shifting keeps the tempo
Pitch and speed are linked in the simplest kind of playback: playing samples faster raises every frequency and shortens the sound. Pitch shifting separates the two. This tool first resamples the audio to raise or lower its pitch, which also changes its speed, and then applies time stretching in the opposite direction to restore the original tempo.
Musical pitch is logarithmic. Each semitone multiplies the frequency by the twelfth root of two, about 1.0595, and twelve semitones double it. That is why the shift is set in semitones rather than in percentages: a two-semitone shift moves a song from C to D whatever its tempo or instrumentation.
Transposition is common practice. Singers move songs to keys that suit their range, guitarists choose keys with easier chord shapes, and accompanists match backing tracks to performers. Small shifts are almost transparent; larger ones affect the timbre of voices, which may be exactly the effect you want for creative work.
Fine tuning addresses a different problem: recordings that are slightly out of tune with standard A = 440 Hz, such as older records or instruments tuned differently. A correction of a few cents brings them back in line with other instruments.