Any site with sound

How to change the pitch or key of a song on Apple Music

Elyra Labs teamAug 21, 20263 min read

The short answer

Apple Music has no pitch or key control of its own, and its web player streams encrypted audio, which is why most audio extensions do nothing there. Capo processes the sound inside the same audio context that negotiated the encryption, so the pitch dial works on music.apple.com the same way it works on an ordinary video.

Open music.apple.com in a tab and start a track.
Open Capo and move the pitch dial in semitones.
Speed and volume work on the same tab.

Apple Music gives you play, pause, and a volume slider. There is no key control, no speed control, and no way to slow a passage down to learn it. That is a reasonable choice for a listening product and an annoying one if you are trying to play along.

It has to be the web player

Capo is a browser extension, so it works on music.apple.com in a tab. The desktop Music app is a native application and nothing in the browser can reach it. Open the album in a browser instead and everything below applies.

The popup on a tab that is playing: pitch, speed and volume, with the A–B loop underneath.

Why encrypted audio usually breaks extensions

Apple Music streams protected audio. The ordinary way an extension taps a page’s sound is to attach an analyser to the media element, and on protected media the browser refuses — it will not hand the decoded samples to arbitrary code. That is the correct behaviour, and it is why most pitch extensions quietly do nothing on Apple Music, Tidal or Spotify.

Capo does not pull the audio out. It replaces the page’s audio context with one that has the pitch-shifting worklet spliced in before the speakers, so the samples never leave the context that negotiated the encryption. Nothing is decrypted, copied, recorded or uploaded — the sound is processed on its way out and then it is gone.

What you would actually use it for

Move	Why
Down 1–3 semitones	A vocal line that sits just above your range
Down 1 semitone	Matching a guitar tuned to E flat
Speed 0.6–0.8×	Catching a fast lyric or a run
A–B loop	Repeating one phrase while you find it

Put a key control on Apple Music.

Free · nothing uploaded

Add to Chrome — free

Where it stops

Capo cannot change what Apple Music will play you, cannot work in the desktop app, and cannot save its result to a file. It also will not help if the tab is not actually playing — the controls stay inert until there is sound to work on.

Questions

Can you change the pitch on Apple Music?

Yes, in the web player at music.apple.com. Open a track in a browser tab and Capo adds pitch, speed, volume and looping to it. The desktop Music app is a native application and cannot be reached from a browser extension.

Does it work even though Apple Music is encrypted?

Yes. Capo processes the audio inside the same context that negotiated the encryption rather than extracting it, so protected playback keeps working normally.

Does this download or record my music?

No. There is no export, no recording and no file output. Capo changes what you hear as it plays and nothing is stored or uploaded.

Does it work in the Apple Music desktop app?

No. Capo runs in the browser, so it needs the web player in a tab.

How far can I move the key?

Twelve semitones each way by default, in single-semitone steps, with fine tuning of ±50 cents between them.

Keep reading

Any site with sound2 min

How to change the pitch or key of a song on Spotify

The Web Player has no key control. Capo adds pitch, speed and looping to it, and to SoundCloud and Bandcamp.

How it works3 min

Why most audio extensions do nothing on Spotify or Tidal

Protected streams refuse to hand their samples to page scripts. Here is why, and what has to be done differently.

Any site with sound3 min

Every site Capo works on, and the handful it cannot

Anything with HTML5 audio or video, plus per-site track detection on ten services. And the real limits.