How to Retune Apple Music Songs to 432 Hz

If you’ve been searching for a way to retune your Apple Music library to 432 Hz, the short answer is: you can retune music you own (iTunes Store purchases, ripped CDs, your own files), but you can’t retune music you stream (Apple Music subscription tracks). This guide walks through how to tell which is which, how to extract the file, and how to retune it cleanly.

What can and cannot be retuned

This is the first thing to get straight, because most “how to retune Apple Music” search results gloss over it:

If your track is one of the green-checkmark rows above, you’re good. Skip ahead to the workflow. If it’s a streaming track, you’ll need to buy or import a copy first — there’s no legal in-browser way around the DRM.

Step 1: Find the file on your computer

For iTunes Store purchases or CD imports:

1. Open the Music app (or iTunes on older systems).
2. Right-click the song and select Song Info (or Get Info).
3. Go to the File tab — note the location (usually ~/Music/Music/Media/).
4. Alternatively, right-click → Show in Finder to jump straight to the file.

The file will typically be .m4a (AAC) or .mp3. Both formats decode cleanly in modern browsers via the Web Audio API.

Step 2: Check that it’s actually DRM-free

If you’re not sure whether a file is DRM-protected:

• In Music.app, open Song Info → File. The format will read either Purchased AAC audio file (DRM-free, post-2009) or Protected AAC audio file (DRM-protected, pre-2009).
• If it’s protected, Apple historically offered a one-time DRM removal via iTunes Match or by re-downloading. If you can re-download the track from your purchase history, do that — the modern version will be DRM-free.

Step 3: Retune with the Song Re-Tuner

Once you have the file:

1. Open the Song Re-Tuner.
2. Drag the M4A or MP3 onto the upload area (or click to browse and select it).
3. Pick 432 Hz from the frequency dropdown (or any other Solfeggio target — see Solfeggio Frequencies Explained).
4. Click Retune Now.
5. Download both the WAV and MP3 versions. The WAV is a lossless copy of the retuned audio; the MP3 is convenient for re-importing into Music.app.

Total time: under a minute for a typical 3-4 minute song.

Step 4: Import the retuned version back into Music.app

To listen to your retuned version inside Apple Music / Music.app:

1. Open Music.app.
2. Drag the downloaded .mp3 (or .wav) onto the Music window.
3. The file will appear in your library. You can edit the metadata (Track Info) to make it clear this is the retuned version — for example, append [432 Hz] to the title.
4. Add it to playlists, sync it to your devices, etc., the same as any imported file.

File-format notes

A few practical details about Apple Music file formats and the Song Re-Tuner:

• M4A (AAC) files decode fine in Safari, Chrome, Firefox, and Edge. The Web Audio API handles them through the browser’s built-in decoder.
• Apple Lossless (ALAC) files (often .m4a with lossless audio) also decode in modern browsers.
• Apple Lossless via Apple Music subscription is streamed — same DRM issue as standard subscription audio.
• The Song Re-Tuner outputs standard WAV (16-bit PCM) and 128 kbps MP3. The WAV is the higher-quality option for re-importing.

Common gotchas

”My file won’t upload”

• Make sure it’s a local file (not a streaming link or a cloud-only “iCloud Music Library” reference).
• If the file is in your iCloud Music Library but not downloaded locally, download it first (right-click → Download).
• Browsers can struggle with very large files (200+ MB). Most music files are under 20 MB, so this is rare.

”It says it processed but the result sounds weird”

• Make sure you didn’t accidentally upload an iCloud placeholder or a corrupted file. Try playing the source file in Music.app first to confirm it works.
• Re-try in a different browser if the result is glitchy.

”I want lossless quality end to end”

• Use the WAV output, not the MP3.
• If your source is Apple Lossless (.m4a ALAC), the retune is rendered through Web Audio’s 32-bit float pipeline, then written to 16-bit PCM WAV. This is high quality but not bit-perfect lossless to the source. For most listening this is indistinguishable.

Building a retuned Apple Music library

If you want a chunk of your library at 432 Hz:

1. Start with the most-listened. Identify your top 20 tracks. Retune those.
2. Tag retuned files distinctly. Append [432 Hz] to the title and consider a separate album field (e.g., Original Album (432 Hz Retune)) so they’re easy to find.
3. Keep originals. Don’t delete source files — the retuned version is an addition.
4. Build smart playlists. A smart playlist that filters by comment contains 432 Hz or album contains 432 Hz Retune makes it easy to put your retuned library on shuffle.

A note on streaming “432 Hz” Apple Music playlists

Apple Music has user-generated playlists labeled “432 Hz” or “Solfeggio Frequencies.” These face the same problem as YouTube and Spotify Solfeggio tracks: the source files are uploaded by users with no platform-level verification, and many are mislabeled, EQ-only, or sourced from low-quality re-encodings. If you want a track you can trust, retune one you already own. See Why Retune Instead of Streaming?.

Open the Song Re-Tuner and drop in a track from your Music library.

Related guides

• How to Retune Music to 432 Hz — the general workflow.
• How to Retune YouTube Music — for tracks you’ve legally acquired from YouTube.
• Why Retune Instead of Streaming? — why DIY beats playlists.

References

• Apple Music & DRM (Apple Support)
• A440 pitch standard history (Wikipedia)
• Web Audio API specification (W3C)