432 Hz music player
Diapasón retunes your own music to 432 Hz — a warmer, gentler pitch — in real time, losslessly, right on your device.
Windows — now on the Microsoft Store · free browser extension
One thing, done beautifully
Flip between 432 and 440 Hz as the song plays and hear the difference. Nothing is re‑encoded, no quality is lost.
Load the songs already on your device and queue them up. Everything stays offline — no accounts, no streaming.
Export any track to a retuned WAV or MP3 to keep, sync, or share — your original file is never touched.
Three calm themes and eleven languages, so it settles into your day the way you like it.
Why 432
For a growing community of listeners, 432 Hz isn't about proving a theory — it's about how the music feels: warmer, rounder, easier to sink into. Here's where that idea comes from, and what people — and a handful of studies — have noticed.
Before the world settled on A = 440 Hz — fixed by international agreement only in the mid‑20th century — there was no single pitch at all. Orchestras across 18th‑ and 19th‑century Europe tuned lower and to no fixed reference; France's official diapason normal sat at 435, and Giuseppe Verdi argued for a warmer A closer to 432, kinder to singers' voices. Diapasón simply points there again: about a fifth of a semitone below 440, a softer reference many listeners describe as calming and grounding.
In a 2019 double‑blind cross‑over pilot, listeners' average heart rate fell by roughly 5 bpm hearing the same music at 432 Hz instead of 440 — a significant difference.
Calamassi & Pomponi · 2019 →Patients recovering from spinal‑cord injury slept significantly better with their favourite music at 432 Hz (sleep score +3.6) — and called it clearer and deeper than 440.
Acta Biomedica · sleep pilot →A randomized, double‑blind trial with emergency nurses during the pandemic found 432 Hz a simple, low‑cost way to ease anxiety and stress.
Emergency‑nurses RCT · 2022 →In that same 2019 study, people felt more focused — and more satisfied — after the 432 Hz sessions than after the 440 Hz ones.
Calamassi & Pomponi · 2019 →And the research keeps growing — 432 Hz is now being studied in real clinical settings, from dental anxiety during tooth extractions to cardiovascular care for people with cancer.
The word diapasón is the old name for concert pitch — the single reference every instrument tunes to. Ours simply points a little lower.
These are early, small studies, and part of the effect may be that gentler, slower sound is simply easier to enjoy. Diapasón makes no medical claims — it just lets you hear what feels good to you.
Calm by design
Calm, Light and Dark — pick the mood that fits the moment.
From English and Español to 日本語, हिन्दी and Русский.
Your music is processed on‑device. Nothing is uploaded, ever.
English · Español · Français · Deutsch · Português · Italiano · 日本語 · 한국어 · 中文 · हिन्दी · Русский
See it
Export a track — or all of them
One tuning, two ways
The app, for the music you own. The extension, for your streaming in the browser.
Pay once
About what you'd spend on a coffee or a candy bar — buy it once on your store and Diapasón is yours forever. No subscription, no ads, no upsells. Every future update included.
Available on the Microsoft Store for Windows. The browser extension is free — a taste of 432 for what you stream.
Good to know
Bring your own music to 432 Hz. One‑time purchase on your store of choice — no subscription, yours to keep.
Windows 10 & 11 · free browser extension