FourThirtyTwo

How to export 432 Hz music as FLAC, ALAC, or MP3 to the Files app

Once a track is retuned, FourThirtyTwo can save it as MP3, M4A AAC, lossless ALAC, FLAC or WAV, straight to the Files app or through the share sheet. Here’s which format to pick and exactly how to do it.

Updated September 30, 2026 · 5-minute read · iPhone and iPad

Quick steps

  1. After Conversion Complete, tap Export.
  2. Tap the Format row and choose MP3, M4A AAC, M4A ALAC, FLAC or WAV.
  3. Check the Title, then tap Save to Files (or Share…).
  4. Pick a folder and tap Save.

Which format should you choose?

Export options in FourThirtyTwo. Size estimates in the app are approximate.
Option in the appQualityGood for
MP3 High (ABR 256)
.mp3		Lossy, about 256 kbps averageMaximum compatibility: cars, older players, any app
MP3 n kbps (MP3 Custom Bit Rate in Settings)
.mp3		Lossy, constant 32–320 kbpsA specific bitrate, or smaller files
M4A AAC 256 kbps
.m4a		Lossy, 256 kbps AACEveryday listening on Apple devices (the default)
M4A ALAC
.m4a		Lossless (Apple Lossless)Lossless files that play natively in Apple apps
FLAC
.flac		LosslessLossless libraries and players outside Apple’s ecosystem
WAV
.wav		Uncompressed PCMEditing in a DAW or audio editor, with the largest files
  • Metadata: MP3, M4A and FLAC exports keep the title plus supported artist, album, comment and artwork metadata, in single and batch conversions alike. WAV exports contain the converted audio without metadata.
  • Lossless can’t add quality. Exporting an MP3 source as FLAC won’t make it sound better than the MP3. It only avoids a second round of lossy compression. Lossless output makes most sense when the source is lossless too.
  • What we measured: the FLAC files FourThirtyTwo saved in these guides were 44.1 kHz, 24-bit stereo, exactly the same length as their sources.

Step by step

  1. Open the export screen

    After converting a track (how to convert), tap Export on the Conversion Complete screen. The export screen shows the current Format, which starts as your default, and the Title that will be used for the file name.

    Export screen with Format M4A AAC 256 kbps at about 2.2 MB, Title Lanternfield (432 Hz), and Save to Files and Share buttons

  2. Choose a format

    Tap the format row to see every option, most with an estimated file size, then tap the one you want. The MP3 row with your own bitrate shows its size once you select it. The app encodes the file in that format when you save it.

    Format list expanded: M4A AAC 256 kbps selected, MP3 High (ABR 256), MP3 320 kbps, M4A ALAC, FLAC and WAV, with estimated sizes

  3. Check the title and save

    Edit the Title if you like. It defaults to the original name plus the target, such as Lanternfield (432 Hz). Tap Save to Files. A progress bar appears while the file is prepared.

    Or tap Share… to send it with AirDrop, Messages, Mail or another app.

    Export screen with FLAC selected at about 12.6 MB, Title Lanternfield (432 Hz), and Save to Files and Share buttons

  4. Pick a folder

    The iOS save sheet opens. Choose where the file goes, such as On My iPhone or iCloud Drive (we used a Retuned folder), and tap Save. The file appears there as Lanternfield (432 Hz).flac, and your original is unchanged.

    iOS save sheet open on the Retuned folder with a Save button and Save as Lanternfield (432 Hz) at the bottom

Exporting later from the Library

If you tapped Add to Library, you can export again at any time. Open Library from the home screen, tap ••• next to a track and choose Share… or Save to Files. The same sheet lets you edit the title, artist and album. To export several tracks at once, tap Select in the library.

Library listing converted tracks, each tagged 432 Hz, with Quiet Meridian (432 Hz) playing in the mini player
The Library, with one track playing.
Edit Track sheet with Title, Artist and Album fields, Share and Save to Files export options, and Delete Track
Edit Track: change tags, share, or save to Files.

Change the default format

New conversions use the format set in Settings › Defaults › Default export format. Open it from the gear icon on the home screen. If you always want FLAC or ALAC, set it there and Create 432 Hz File will produce that format directly.

Settings screen with the Default export format menu open, listing MP3 High (ABR 256), MP3 Custom Bit Rate, M4A AAC 256 kbps (selected), M4A ALAC, FLAC and WAV
Settings › Default export format.

About the audio in these screenshots. The tracks (“Lanternfield”, “Quiet Meridian” and friends by “Demo Ensemble”) are short original pieces synthesized for these guides and saved as ordinary MP3, M4A, WAV and FLAC files. They’re part of our tuning test set, which you can download. Everything else is real: the app imported them through the normal Files picker, analyzed and converted them on the device, and the charts are measured from the exact files it exported.

Try it on your own music

FourThirtyTwo is a one-time purchase for iPhone and iPad. No subscription, no account, and your audio never leaves your device.

Requires iOS or iPadOS 18 or later.