Free · In your browser · Never uploaded
Change the key of a song without changing the speed
Short answer: use a pitch changer that keeps the tempo fixed. StemConsole’s free player below moves any song up to 12 semitones either way at the same speed, in your browser. Nothing uploads.
Reading the file…
Original key, speed stays where it is
Original speed, original pitch
The whole song at its original speed and key, as an MP3 made on this device. Free with a StemConsole account.
Saving your version is free with a StemConsole account. Sign in once and save as many as you like.
Signed up with an email link? Sign in on the homepage, then come back to this tab.
Your MP3 is ready
Now split it into stems and practise your part. Mute the vocal and sing over the real band. Moving the stems’ key is part of Pro.
Split a song freeOther options: Audacity’s Change Pitch effect does it free on desktop, rendered offline, and Moises does it in its app (2 semitones free, more on paid plans). To sing over the backing in your new key, press Practise this song with stems: StemConsole separates the vocal from the band so you can mute it, and moves the stems’ key with Pro.
How to change the key of a song
- 1
Choose a song
Press Choose an audio file, or drop one on the player: MP3, WAV, FLAC, M4A, AAC or OGG. It plays on your device and never uploads.
- 2
Set the new key
Press + or − to move the song a semitone at a time, up to 12 either way. The speed does not move. Sing the chorus and adjust until the top note sits comfortably.
- 3
Name the new key
Set Song key to the original key, from the chart or the free Key & BPM Finder, and the player names the new key for your band.
- 4
Loop the chorus
Drag across the waveform to loop the chorus while you test keys. If the song is also too fast, slow it down with Speed; the two are independent.
- 5
Save it in your key
Press Download MP3 to save the whole song in the new key, for a gig or a karaoke app. The MP3 is made on your device and is free with a StemConsole account.
- 6
Split it into stems
Press Practise this song with stems. Vocal Remover (free) gives vocals and instrumental; Basic Split (free) also separates drums, bass and other. The first split needs no account.
- 7
Sing over the band
In the practice room, mute the vocal or keep it low as a guide. Key change on separate stems, and a bounce of the mix in the new key, are Pro; with Pro the stems open in your key.
How to find the right key
Find the highest note in the song, usually in the last chorus, and sing it. If it is a strain, count how many semitones you need to come down until it sits inside your comfortable range, then shift by that amount. Most singers land within two to four semitones; if you need more than five, try singing the melody an octave lower instead. To name the new key for a band or a chart, read the original with the free Key & BPM Finder and set it as Song key in the player: it names the new key as you move.
Guitarists use the same control the other way. Many classic recordings were tracked a half step down, so shifting the song up one semitone lets you play along in standard tuning. Shift down two for a whole-step-down tuning, or down one to skip a capo.
Small shifts sound natural. Beyond about four semitones the bass turns flabby going down and thin going up. The vocal stem sounds odd when shifted, which is another reason to mute it and sing.
What to expect
Drums come through cleanly because they are mostly unpitched, but sustained instruments pick up a light chorus-like texture as the shift grows, and reverb tails move with it. Keep the change as small as your voice allows and check the result on headphones before recording over it.
What is free and what is Pro
| Free | Pro | |
|---|---|---|
| Change key | The whole song, 12 semitones either way (the player on this page) | Separate stems too, in the practice room |
| Slow down | The whole song, 50% to 150%, pitch kept | Separate stems too |
| Save it | The whole song as an MP3 in your key, with a free account | Mix bounces in a new key, MP3 or WAV |
| Stems | Vocal Remover and 4-stem Basic Split | 6-stem Full Separation (adds guitar and piano) |
| Looping | An A/B loop on this page, and one in the practice room with a free account | Named loops, count-in, tap tempo |
| Downloads | MP3 stems and MP3 mix bounces | WAV stems and bounces, including at a changed speed or key |
| Splits | 5 a month; first needs no account | 100 a month |
Pro is US$6.99 a month or US$49 a year. A US$1.99 credit buys one Full Separation, no practice tools, never expires. See plans.
Frequently asked questions
Does changing the key change the speed?
No. Key and Speed are separate controls, so you can move a song down three semitones at exactly the original tempo, or change both at once.
Is it free?
Yes. The player on this page is free, with no account and no cap on songs, and nothing uploads. Saving the transposed song as an MP3 is free with a StemConsole account. Splitting the vocal from the band is free too, with 5 splits a month. Key change on separate stems is Pro, US$6.99 a month or US$49 a year.
Can I change the key of an MP3?
Yes. The player takes MP3, WAV, FLAC, M4A, AAC and OGG files up to 100 MB (40 MB for compressed files such as MP3) and 20 minutes long, or 12 minutes on a phone or tablet. The splitter takes files up to 200 MB.
How far can I transpose?
Twelve semitones up or down. One to four sounds natural; beyond six is best kept for working out parts rather than performing over.
Is my song uploaded?
No. The player decodes and plays the file on your device, and Download MP3 makes the file there too, so the song never leaves it. If you press Practise this song with stems, the splitter uploads it, as it does any song you split.
Can I save the transposed song?
Yes. Press Download MP3 and the whole song is saved in the new key as an MP3, made on your device. It is free with a StemConsole account: sign in with Google, or with your email link on the homepage. To save the band with the vocal muted in the new key, split the song and bounce the mix with Pro, as MP3 or WAV.
Does it work on a phone?
Yes, in the mobile browser with nothing to install. Choose a song from your phone’s files and use headphones to hear the detail.
Compared with Audacity and Moises
| Audacity | Moises | StemConsole | |
|---|---|---|---|
| Key change without speed change | Yes, offline render | Yes: 2 semitones free, unlimited on Premium | Yes, live, 12 semitones, free |
| Mute the vocal first | Centre-channel reduction only | Yes, stems | Yes, stems |
| Hear the change instantly | No, apply and listen | Yes | Yes |
| Runs in the browser | No, desktop install | Web and mobile app | Yes, no install |
| Cost | Free | Premium subscription; price shown after login | Free player and splits; Pro US$6.99 a month |
More tools compared, with prices and platforms: the best tools to change a song’s key.
Related guides and tools
Slow down a song without changing pitch
Learn fast passages at a comfortable speed without changing the key, free in your browser.
Loop a section of a song
Repeat a phrase until it sits under your fingers. Basic looping is free; named loops need Pro.
Create a backing track
Set each stem’s level, then bounce the mix: MP3 free, WAV with Pro.
Karaoke maker
Turn any song into a karaoke-ready instrumental in minutes.
Vocal remover
Strip the vocal from any track: clean instrumental plus isolated vocal.
How to make a karaoke track from any song
From the blog. Remove the lead vocal, keep the music, and check the result.
Key & BPM Finder
Find a song’s key and tempo free, right in your browser.
Online metronome
Accents, subdivisions, tap BPM and a speed trainer, free in your browser.
Written by Dan Murtagh, mixing engineer and audio educator. Updated 3 October 2026.