In this guide
Select the audio and use Effect → Pitch and Tempo → Change Pitch. Enter a positive or negative semitone shift, preview it and check the exported file. The detected starting note is not a song-key detector.
To change pitch in Audacity without deliberately changing tempo, select the audio and choose Effect → Pitch and Tempo → Change Pitch. Enter a semitone shift, preview the selection and apply it. Export a separate audio file and listen to the actual result before using it in a project.
Positive semitones raise the pitch; negative semitones lower it. Every sound in the selected mix shifts together, including voices and instruments. Audacity's Change Pitch manual documents the controls and important limits described below.
Change pitch in Audacity step by step
- Open and preserve the original. Import your recording into Audacity. Keep the original file separately and save an editable project if you plan multiple changes.
- Select the intended audio. Drag across a passage or select the whole relevant track. For a full-song transposition, include the complete music, including the ending. If several tracks must stay together, select the intended material on each and check the result as a mix.
- Open Change Pitch. Choose Effect → Pitch and Tempo → Change Pitch. Menu names may vary by Audacity version.
- Enter semitones. Try a small amount first, such as +2 to raise by two half-steps or −2 to lower by two. If you know a song is in C major, +2 moves its tonic to D; it remains major. Do not rely on the effect's detected starting note as the song's key.
- Preview and apply. Listen to a representative selection, then apply the effect. Review quiet notes, transients, voice character and the ending. Larger shifts can sound less natural.
- Export and test. Choose File → Export Audio and select the range and format you need. Reopen the exported file and listen through it; an Audacity project and an audio export are different files.
Audacity's effect applies to the selected audio. If it is used on a time-stretched clip, the changed speed may be rendered; its manual also notes an envelope-related issue in some circumstances. Keep the unedited project and check the envelope and resulting audio after applying the effect.
How many semitones should you use?
| Your aim | Starting point | What to listen for |
|---|---|---|
| Lower a backing for a singer | Try −1 or −2 semitones, then adjust based on the singer's range. | Whether the melody is comfortable and the instruments and any existing vocal still sound usable. |
| Raise a known C-major song to D major | Use +2 semitones. | The entire selected recording moves; check the new key and arrangement by ear. |
| Change an individual sound | Select the intended clip and try a small shift in either direction. | Its attack, tail and alignment against the surrounding timeline. |
| Convert major to minor | A uniform pitch shift is not the solution. | Changing mode requires changing musical intervals or arrangement, not moving every note equally. |
A semitone is one half-step in the standard twelve-step octave. A +12 shift raises a tone by an octave, while −12 lowers it by an octave. Different octave directions can reach the same note name but sound very different. The song-key guide explains choosing an interval and comparing a practice copy.
Pitch, tempo and duration are different
Change Pitch aims to alter pitch without changing tempo. Audacity's manual notes that the default process does not always preserve the selection's exact length; its Use high quality stretching (slow) option preserves exact selection length according to that documentation. Processing takes longer, and you should still check the result in its intended timeline.
Change Speed and Pitch changes both speed and pitch together. If your goal is a slower practice passage while keeping pitch, use a tempo-focused method instead. The slow-down guide compares that separate task.
Why does the shifted audio sound strange?
Pitch shifting is processing, not access to the original performance at another pitch. It can change attacks, create a metallic texture or alter the character of a voice. Large changes, mixed music and reverb can make artifacts more noticeable. Compare a smaller shift from the original, rather than repeatedly processing an already shifted export. If an authentic performance in the new key matters, another take or an original multitrack project may be better.
If the result no longer aligns with video or another recording, compare a clear transient near the beginning and another near the end. Check selection boundaries, processing length and any MP3 encoding delay or padding; use a suitable working format and editor for precise sync.
Change pitch in a browser instead
The Saturalabs pitch changer processes supported mono or stereo MP3 and WAV locally. Choose a file up to five minutes and 50 MiB, set −12 to +12 semitones, then prepare and preview a WAV or MP3 export. The output must also fit 50 MiB.
It shifts the complete selected recording and does not detect key or separate a singer. Nominal tempo is retained, but processed tails can slightly extend duration; MP3 can add delay or padding. Voice formants are not preserved, so compare the actual export before downloading. The tool and Audacity may sound different; neither guarantees a transparent shift.
Common questions
Does Audacity automatically know the key?
No. Its detected starting pitch is an estimate of a note near the start of the selection, not a detection of the song's key. Determine the key separately if you need a specific target.
Can I change only the singer's pitch in a finished mix?
Not with a uniform Change Pitch effect applied to the entire mix. Use the original vocal track when available. A source-separated estimate may contain bleed or artifacts and is not guaranteed to behave like the original stem.
Is a WAV export automatically higher quality than the original MP3?
No. A PCM WAV can avoid another MP3 encode in a working copy, but it cannot restore information discarded in the source or remove processing artifacts.