Pitch and speed apart
Shift the key up or down by up to twelve semitones while the tempo stays put, or change the speed from 0.50× to 2.00× without touching the key.
Pitch Changer: Change the Pitch and Speed of Any Song
Change the pitch, key and speed of any song in your browser with this free pitch changer.
Change the pitch in three steps
No signup and no install. It works on computers, tablets and phones.
- 01
Open a song
Drop an MP3, WAV, M4A or OGG file into the box or choose it from your device. The demo loop lets you try the tool without a file.
- 02
Set pitch and speed
Move the pitch in semitones and the speed from half to double. Keep the pitch locked, or let it follow the speed for slowed and sped up edits.
- 03
Listen and save
The preview updates as you change the sliders. Add reverb if you like, then save the result as an MP3 or a lossless WAV file.
A pitch shifter and speed changer in one
Everything a musician, singer or editor needs to move a song into a new key or tempo.
Slowed + reverb and sped up
Switch the pitch lock off and the song behaves like a turntable: slower and deeper, or faster and brighter. One preset adds the reverb that slowed edits are known for.
New BPM and new key at a glance
Enter the original tempo and key, and the tool shows the result for every setting. Type a target BPM and it sets the exact speed for you.
Private, free, MP3 or WAV
Your file is processed in the browser and never uploaded. Save the result as MP3 at 192 or 320 kbps, or as WAV for full quality, with no watermark.
How the pitch changer works
Pitch and speed are tied together in any recording. Play a tape or a record faster and it gets higher; slow it down and it gets lower. That is the simplest way to change audio, and it is exactly what you hear when "Keep the pitch when changing speed" is switched off. A speed of 0.85× then lowers the song by almost three semitones and makes it 15 percent longer.
To change one without the other, the pitch changer works in two steps. First it resamples the audio, which moves pitch and speed together by the amount you asked for. Then it time stretches the result back to the length you want. The stretch cuts the sound into short overlapping slices of about 46 milliseconds and lays them out again, each one placed where its waveform lines up best with the slice before. That keeps notes smooth and avoids the robotic echo of a simple loop.
All of this runs on your own device, in a background thread of the browser, so the sliders stay responsive while a long song is processed. The preview you hear is the same audio that is saved, including the reverb, which is rendered once more at full quality when you press save.
Semitones, keys and frequency ratios
Western music divides an octave into twelve semitones. Each semitone raises the frequency by the same factor, the twelfth root of two, which is about 1.0595. Twelve of them double the frequency: the A above middle C at 440 Hz becomes 880 Hz an octave up. The table shows what common shifts do, and how fast a record would have to spin to reach the same pitch without a pitch lock.
To move a song into another key, count the semitones between the two key notes. C to D is two up, C to Bb is two down, and E minor to G minor is three up. Because twelve semitones bring you back to the same note, a shift of plus five gives the same key as minus seven, only in a different octave. Pick the smaller step for a more natural sound.
| Shift | Frequency ratio | A 440 Hz becomes | Record speed for the same pitch | Interval |
|---|---|---|---|---|
| -12 semitones | 0.5000 | 220.0 Hz | 0.50× (50 %) | Octave down |
| -7 semitones | 0.6674 | 293.7 Hz | 0.67× (67 %) | Perfect fifth down |
| -5 semitones | 0.7492 | 329.6 Hz | 0.75× (75 %) | Perfect fourth down |
| -3 semitones | 0.8409 | 370.0 Hz | 0.84× (84 %) | Minor third down |
| -2 semitones | 0.8909 | 392.0 Hz | 0.89× (89 %) | Whole step down |
| -1 semitone | 0.9439 | 415.3 Hz | 0.94× (94 %) | Half step down |
| +1 semitone | 1.0595 | 466.2 Hz | 1.06× (106 %) | Half step up |
| +2 semitones | 1.1225 | 493.9 Hz | 1.12× (112 %) | Whole step up |
| +3 semitones | 1.1892 | 523.3 Hz | 1.19× (119 %) | Minor third up |
| +5 semitones | 1.3348 | 587.3 Hz | 1.33× (133 %) | Perfect fourth up |
| +7 semitones | 1.4983 | 659.3 Hz | 1.50× (150 %) | Perfect fifth up |
| +12 semitones | 2.0000 | 880.0 Hz | 2.00× (200 %) | Octave up |
Change the key to sing or play along
Singers change the key of a song to fit their range. If the chorus is too high, try one or two semitones down; if the verses feel too low and quiet, go up. Most people have a comfortable range of about an octave and a half, so a shift of two or three semitones is often all it takes to make a song fit. Record a take over the shifted track and compare.
Guitarists use the pitch changer to play along with bands that tune down a half step or a whole step, without retuning the guitar: shift the song up by one or two semitones and it matches standard tuning. Horn players move songs into a key that suits their instrument, and choirs rehearse in the key of the concert. If you do not know the original key, our key finder tells you.
To learn a fast passage, slow the song down with the pitch lock on. Start at 0.70× or 0.75×, play along until it feels easy, and raise the speed in small steps. The key stays the same, so what you learn slowly is what you play at full tempo.
Slowed and reverb, nightcore and BPM changes
Slowed and reverb edits play a song at about 80 to 90 percent of its speed with the pitch following along, then wash it in a long reverb. The result is deeper, dreamier and a little sad. Turn the pitch lock off, set the speed around 0.85× and the reverb to 40 or 50 percent, or start from the preset. Sped up and nightcore edits do the opposite at 1.20× to 1.35×.
DJs and producers change the BPM of a track to mix it with another one or to use it as a sample. Enter the current tempo and the target tempo, and the speed is set to match. Small tempo changes of a few percent are barely audible with the pitch lock on. When the track is ready, open it next to a beat in the free beat maker, add drums and bass and record your own vocals over it.
Please respect copyright: changing the pitch or speed of a song does not make it yours. Use the edits for practice, for private listening and for your own recordings, and ask for permission before you publish a remix of someone else's music.
For music teachers
Move any song into your class's key
Shift a song down for young voices, slow down a passage so students can follow it, or show how pitch and speed are linked by switching the pitch lock on and off. When your class is ready to make its own music, Make a Beat gives you a whole classroom. Students join with a code and their name, no email addresses, and you set assignments, listen to what they hand in and grade it. GDPR, FERPA and COPPA ready, servers in Germany, and every school licence starts with a free trial.
Questions about the pitch changer
How do I change the pitch of a song without changing the speed?
Open the song in the pitch changer, leave "Keep the pitch when changing speed" switched on and move the pitch slider. Each step is one semitone, and the length of the song stays exactly the same. Listen to the preview, then save the result as MP3 or WAV. Nothing is uploaded.
How do I slow down a song without changing the pitch?
Set the speed slider below 1.00× and keep the pitch switch on. At 0.75× a song plays at three quarters of its tempo in the original key, which is the classic way to learn a fast solo or a tricky vocal line. The "Practice at 75%" preset does exactly that with one click.
How do I make a slowed and reverb version of a song?
Choose the "Slowed + reverb" preset. It plays the song at 0.85× with the pitch following the speed, like a record turned down, and adds a wide reverb. Adjust the speed between 0.75× and 0.90× and the reverb amount to taste, then save the edit as an MP3.
How many semitones do I need to change the key?
Count the steps between the two keys: from C to D is two semitones up, from A to G is two down. Select the original key in the key box and the pitch changer shows the new key for every setting. Twelve semitones are a full octave, so plus or minus six covers every key.
Does changing the pitch lower the audio quality?
A little, and it grows with the size of the change. Shifts of one to three semitones and speed changes of up to about 20 percent sound natural on most music. Larger jumps make voices sound thin or deep and add a slight flutter. Save as WAV to avoid any further MP3 loss.
How do I change the BPM of a song?
Type the song's current tempo into "Original BPM" and the tempo you want into "New BPM". The pitch changer sets the matching speed, for example 0.88× to turn 100 BPM into 88. With the pitch switch on, the key stays the same. Use the BPM tapper if you do not know the tempo.
Is my audio file uploaded to a server?
No. The file never leaves your device. Your browser decodes it, changes the pitch and speed in memory and writes the new MP3 or WAV on your computer or phone. That makes the tool safe for unreleased songs, voice memos and recordings of your band rehearsal.
Is the pitch changer free and does it work on a phone?
Yes, it is free with no account, no watermark and no limit on files. It runs in Chrome, Safari, Firefox and Edge on Android, iPhone, iPad and computers. On a phone, pick the song from your downloads or the Files app; long songs take a few seconds to process.
Make your own beat in the new key
Open the free beat maker, build drums, bass and chords around your idea and record vocals in your browser.