Want to change the pitch of a song so it fits your voice, matches your instrument or just sounds different? You don't need a studio. A pitch changer can move a track up or down in semitones while the tempo stays exactly where it was. This guide explains what pitch, key and tempo mean, how to choose the right new key, and how to do the shift step by step in a free browser tool, in Audacity and for video files, without making the result sound worse than it needs to.
Pitch, key and tempo: what changes when you shift a song
Three terms get mixed up a lot, so here is what each one means:
- Pitch is how high or low a sound is. A higher note vibrates faster.
- Key is the home base of a song: the note it resolves to and the scale built on it, such as G major or E minor.
- Tempo is the speed, measured in beats per minute (BPM).
The unit that connects pitch and key is the semitone, the distance from one key on a piano to the very next one, black keys included. Twelve semitones make an octave. In standard tuning each semitone raises the frequency by a factor of about 1.059 (the twelfth root of 2), so twelve of them double it.
When you shift a whole song by a number of semitones, every note moves by that amount, so the key moves too. One semitone equals one key step.
| Shift | C major becomes | A minor becomes |
|---|---|---|
| +1 | C sharp (D flat) major | B flat minor |
| +2 | D major | B minor |
| +5 | F major | D minor |
| -2 | B flat major | G minor |
| -3 | A major | F sharp minor |
| ±12 | C major, one octave up or down | A minor, one octave up or down |
Why pitch and speed used to be linked
On a turntable or tape deck, playing a recording faster also makes it higher: double the speed and the whole song jumps an octave. Speed it up by about 12% and it rises roughly 2 semitones. A modern pitch shifter breaks that link. A common approach is to stretch or squeeze the sound in time and then resample it, so you can change the key and keep the tempo, change the tempo and keep the key, or do both.
When to change the pitch of a song (and when to change tempo instead)
Changing the key is the right move when:
- The song sits outside your vocal range. Lowering a backing track by 1 to 3 semitones is often all it takes to make a chorus comfortable.
- Your instrument wants a different key. A song in E flat is awkward on guitar, for example; shifting it up 1 semitone to E opens up easy open chords.
- You're teaching or leading a group. A choir or a class of young singers usually needs a key that sits in the middle of their range.
- You want an effect. Sped-up and slowed edits, a deeper voice for a narrator, or a lighter voice for a character all start with a pitch shift.
Change the tempo instead when the problem is speed. Learning a fast solo is easier at 0.75x, and a workout mix may need a slightly higher BPM. Our BPM finder tells you the starting tempo, so you can work out the exact factor: divide the target BPM by the original. The guide on how to find the BPM of a song also covers tap tempo and counting by hand.
How to pick the target key with a song key changer
Guessing wastes time. Work it out in four steps.
- Find the original key. Run the track through the key finder. It shows the key, the relative major or minor and the Camelot code, and runs in your browser. To check it by ear or from the chords, see how to find the key of a song.
- Find your comfortable range. Sing the highest line of the song, usually the chorus or the bridge, and note whether you're straining. Then sing the lowest line and check it doesn't disappear.
- Count the semitones. Use the table below: subtract the start number from the target number. If the answer is bigger than 6, subtracting 12 gives the same key from the other direction, usually with a smaller and cleaner shift.
- Test small steps. Try -1, -2 and -3 (or +1 to +3) and sing the hardest line each time. Pick the smallest shift where it feels easy.
| Note | C | C♯/D♭ | D | E♭ | E | F | F♯/G♭ | G | A♭ | A | B♭ | B |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
Example: a song in A (9) that you want in F (5) needs 5 minus 9, which is -4 semitones. A song in G (7) that you want in D (2) is -5, or +7 if you'd rather go up, and -5 is the smaller move. Minor keys work exactly the same way.
Drop a song into the free key finder to see its key, Camelot code and BPM. It runs in your browser and nothing is uploaded.
How to change the pitch of a song online for free
Our pitch changer runs entirely in your browser: the file is decoded and processed on your own device, never uploaded, and there's no account to create. It works on desktop and phone browsers.
- Open the file. Choose or drop an MP3, WAV, M4A, OGG or FLAC file, or any other format your browser can decode. For long files it works on the first 10 minutes.
- Set the pitch. Use Lower and Raise on Pitch (semitones) to pick any whole step from -12 to +12.
- Leave the tempo alone, or change it on purpose. Tempo runs from 0.50x to 2.00x in 0.05 steps and doesn't affect the key. Keep it at 1.00x for a pure key change.
- Render and compare. Press Render preview, then play Original and Result side by side. Listen to the busiest part of the song, such as the last chorus.
- Download. Press Download WAV. The file name records the change, for example "(+2 st, 1x)", so you know which version is which.
Pitch and tempo are applied in a single pass, which avoids the quality loss of processing the same audio twice. The tool doesn't use AI; it uses established signal-processing methods. Press Reset to go back to the original key.
How to change pitch in Audacity (free desktop editor)
Audacity is a free audio editor for Windows, macOS and Linux. The steps below follow the Audacity 3.x documentation; Audacity 4 is in alpha at the time of writing and its menus may differ.
- Shift a whole clip. Select the clip and press Alt+Up or Alt+Down to move it one semitone at a time. For exact values, open the clip's overflow menu (...) and choose Pitch and Speed..., where you can also enter cents. The clip shows how far it has been shifted, and Ctrl+click on that indicator (Cmd+click on macOS) resets it.
- Shift a selection. Go to Effect > Pitch and Tempo > Change Pitch. You can set the change as from/to notes, Semitones (half-steps), frequency or Percent Change, and tick Use high quality stretching (slow) for better quality. This permanently changes the audio, so work on a copy.
- Change tempo only. In Audacity 3.4 and later, hold Alt (Option on macOS) over the edge of a clip and drag, or right-click the clip header and choose Change Speed. The older Effect > Pitch and Tempo > Change Tempo effect also works, but the Audacity guide warns that it leaves permanent artifacts.
- Change both at once, tape style. Effect > Pitch and Tempo > Change Speed and Pitch speeds up and raises the pitch together, like a faster turntable.
The Change Pitch manual page itself warns that some audible distortion is expected at more extreme settings, which matches what you'll hear in any tool.
Video pitch changer: how to change the pitch of a video
Most pitch changers, ours included, work on audio files. For a video, the reliable workflow has three steps:
- Get the audio out. Many video editors can export a project's audio track on its own. Audacity can do it too: its manual says that with the optional FFmpeg library installed, it can import audio from most video files.
- Shift it. Change the pitch in the pitch changer or in Audacity and save a WAV.
- Put it back. In your video editor, mute or delete the original audio, place the new WAV at the very start of the timeline, and check lip sync at the end of the clip.
The key detail is tempo: keep it at 1.00x. A pure pitch shift leaves the length untouched, so the new audio lines up frame for frame. Change the tempo and the audio gets longer or shorter than the picture and drifts out of sync. If your editor has its own pitch or voice effect, check its help page; for one-off clips that can be quicker.
How to change audio pitch without artifacts
Every pitch shifter trades a little quality for flexibility. These habits keep the trade small:
- Stay within about ±5 semitones for a natural sound. Beyond that, raised voices go thin and lowered ones go boomy.
- Start with the best file you have. A WAV or high-bitrate MP3 holds up better, because shifting makes existing compression artifacts easier to hear.
- Process once. Make all your changes in one pass instead of shifting a file that was already shifted. Audacity's documentation notes that rendering stretches repeatedly costs quality.
- Take the shorter way round. Up 7 and down 5 land on the same key, an octave apart. When both registers work, pick the smaller move.
- Mind the formants on vocals. A plain shift moves a voice's resonances along with its pitch, which is where the chipmunk and giant sounds come from. This is also why raising your pitch alone doesn't make a voice sound like someone else; our guide on how to sound like a girl explains the other ingredients.
| Shift size | What you'll usually hear | Good for |
|---|---|---|
| 1 to 2 semitones | Hard to tell it was changed | Fitting a singer, tuning to an instrument |
| 3 to 5 semitones | Slight change in vocal color | Bigger range fixes, choirs |
| 6 to 12 semitones | Clear artifacts, thin or boomy voices | Deliberate effects, octave doubling |
Copyright: changing the pitch doesn't change who owns the song
A pitch-shifted song is still the same song. The composition belongs to its writers and publisher, and the recording belongs to whoever owns the master. In the US, 17 U.S.C. § 114(b) gives the owner of a sound recording the right to make versions in which its sounds are "rearranged, remixed, or otherwise altered in sequence or quality", and a pitch shift is exactly that kind of alteration. Other countries protect recordings too; China's Copyright Law, for example, gives recording producers the right to authorize copying, distribution and online transmission.
In practice: practicing with a track you own is a very different situation from uploading a shifted version. Before you publish, use your own recordings, music you have licensed, royalty-free libraries, or the licensed music offered inside the platform you post on. This is general information, not legal advice.
Open a song, choose the semitones, preview the result against the original and download a WAV. Free, in your browser, nothing uploaded.
