reTUNE[432] — 440 to 432 Hz Audio Retuning System

Move a complete recording from A=440 to A=432 Hz with an exact -31.77-cent conversion — private, local, mastering-ready output.

https://retune-432.vercel.app/

What you get

• Full-length web processing
• Windows offline batch tools (process single tracks or entire folders)
• 432 + alternate frequency targets (435, 436, 438, 440, or custom)
• Optional LUFS mastering-aware output

Why it's local

• Your audio never uploads to a server for the free preview
• 24-bit clean WAV output
• One-time payment — no subscription

Free previews are unlimited and export the first half of the recording. This purchase unlocks full-length processing and the offline batch system.