How to convert music to 432 Hz
432 Librarian makes new copies of your songs tuned to 432 Hz. The originals stay as they are. 432 Hz is a listening preference, and we make no health claims.
Before you start
Chrome or Edge on a computer, to save the new files. A guest can try 3 songs. A free account makes 3 songs a day, shared with Convert and Loudness. Pro has no limit. The preview works without an account.
Steps
Choose your music folder
Open the app, go to the Health tab and tap Choose folders. On a first visit the welcome asks for it. Pick the folder where your music is, and allow the browser to change it if it asks.
Open the tool
Open the Tools tab and tap 432 and 528 files.
Pick the tuning
Choose Tuned to 432 Hz (A moves from 440 to 432 Hz) or 528 mode (A moves from 440 to 444 Hz, the tuning whose C is 528 Hz).
Pick how it is tuned
Studio engine moves the pitch and keeps the tempo and length. Resample changes the speed like a turntable: pitch and tempo move together.
Choose songs and listen first
Pick the whole library, a folder, an album or a list. Under Listen first, tap Prepare 20 seconds and compare Before and Tuned.
Make the copies
Choose the Output format (FLAC keeps compressed songs from losing more quality) and where the new files go, then tap Make N tuned copies. Nothing is ever written over a file, and each copy is marked as tuned in its 432 tag.