Change Audio Pitch Online Free — Shift Key Up or Down

Pitch shifting changes the musical key of audio without altering its speed. Moving pitch up makes sounds higher (like singing in a higher key), while moving it down makes them lower. Each semitone equals one piano key step.

You can shift pitch up or down by up to 24 semitones (2 full octaves). For fine-tuning, use the cents slider which adjusts in 1/100th of a semitone increments. Most key changes require 1-7 semitones.

With Lock tempo ON (default), the song's speed stays the same when you change pitch — only the key changes. With Lock tempo OFF, both pitch and speed change together, similar to playing a vinyl record faster or slower.

Formants are the natural resonances of the human voice. Without formant preservation, large pitch shifts make voices sound unnatural (chipmunk effect when raising, monster effect when lowering). Enabling this option keeps the voice character natural.

The tool analyzes the frequency spectrum of your audio using the Krumhansl-Schmuckler algorithm. It compares the energy distribution across 12 pitch classes with known major and minor key profiles to identify the most likely key of the song.