Pitch Shifter

What does a pitch shifter do?

A pitch shifter moves every note of a recording up or down while keeping its length. One semitone is the step to the very next key on a piano, black or white, so +2 semitones turns a song in C into D. Singers use it to fit a song to their range, and players use it to match a track to a capo or an alternate tuning.

Played faster, a record rises in pitch; this tool separates the two. It stretches the audio in time and resamples it, so the key changes and the tempo stays put. Want the classic sped-up sound instead? Try the Nightcore Maker.

Pitch shifting is one of the most common edits in music practice. Teachers transpose backing tracks for students, choirs move songs into comfortable keys and producers shift samples so they fit a beat. This pitch shifter handles all of these in your browser with 0.1-semitone precision and an independent speed control.

Semitone chart: how far should you shift?

The pitch slider moves in steps of 0.1 semitone, so you can also fine-tune a recording that is slightly sharp or flat.

Change the key of a song for singing or practice

• Karaoke and singing: if the chorus is too high, lower the song one semitone at a time until it sits comfortably, then download the backing track.
• Guitar and bass: match a song recorded in E♭ or D tuning without retuning your instrument, or shift it to suit a capo position.
• Horns and transposing instruments: move a track into a key that is easier to read along with.
• Slower practice in the same key: use the Speed slider (0.50×–1.50×) to slow a tricky solo while the pitch stays where you set it.

Pitch shifter vs speed changer

A pitch shifter changes the key and keeps the tempo. A speed changer changes the tempo, and on a turntable the pitch follows. This page keeps the two separate. If you want them linked on purpose, the effect tools do it for you: Nightcore speeds up and pitches up, while Slowed and Reverb slows down and pitches down.

Shifts within ±3 semitones sound natural on most music. Larger shifts work well on instruments, but vocals start to sound processed — that is a limit of every pitch shifter, not only this one.

How to convert a song to 432 Hz

Most modern music is tuned so that the A above middle C is 440 Hz. “432 Hz music” is the same song retuned so that A is 432 Hz — about a third of a semitone lower. To convert a song:

1. Upload your MP3, WAV or FLAC file.
2. Choose the 432 Hz tuning preset. It lowers the pitch by 0.32 semitones and keeps the speed at 1.00×.
3. Preview, then download the 432 Hz version as MP3 or WAV.

The change is subtle: the song sounds very slightly lower and warmer. Claims that 432 Hz has special healing effects are not backed by scientific evidence, but many listeners simply prefer the sound — and this pitch shifter lets you compare both versions in seconds.

How does pitch shifting work?

Speeding up a recording raises its pitch, and slowing it down lowers the pitch — that is what happens on a turntable. To change pitch without changing speed, a pitch shifter first time-stretches the audio, then resamples it back to the original length:

1. The audio is cut into short overlapping slices of a few milliseconds.
2. Slices are repeated or skipped to make the recording longer or shorter while keeping its pitch.
3. The stretched audio is resampled, which moves every pitch up or down and returns the song to its original duration.

This pitch shifter does all of this in your browser and plays the result instantly, so you can audition several pitch settings before you download.