What is 432 Hz and why did we build a whole sound environment around it?

If you've spent any time in wellness or music circles, you may have come across the idea of 432 Hz. It has a devoted following, a fair amount of scepticism, and a complicated relationship with scientific evidence.

For us, it wasn't a question of whether to build Savara around it. It was always going to be central. Here's why.

The basics: what does 432 Hz actually mean?

Every musical note is a sound wave vibrating at a specific frequency. The standard modern tuning system is built around A = 440 Hz, meaning the note A above middle C vibrates 440 times per second. This has been the international standard since 1953.

432 Hz tuning is an alternative system where that same A is tuned slightly lower, to 432 vibrations per second. The difference is subtle and most people cannot hear it as a distinct pitch change. But proponents argue that it produces a qualitatively different listening experience: warmer, more resonant, more naturally aligned with the body.

What does the science say?

Honestly, the scientific evidence for 432 Hz is limited and contested.

There are studies that suggest participants find 432 Hz recordings more relaxing than their 440 Hz equivalents, but these studies tend to be small, and the field is not settled. There are also claims about 432 Hz connecting to natural mathematical patterns, Pythagorean tuning, and even planetary frequencies. Some are genuinely interesting ideas, and some have wandered into territory that's difficult to verify.

We're not going to dress up thin evidence as solid science. That's not what we’re about.

So why did we build Lullio around it?

The scientific evidence for 432 Hz is limited and contested.

There are studies that suggest participants find 432 Hz recordings more relaxing than their 440 Hz equivalents, but these studies tend to be small, and the field is not settled. There are also claims about 432 Hz connecting to natural mathematical patterns, Pythagorean tuning, and even planetary frequencies. Some are genuinely interesting ideas, and some have wandered into territory that's difficult to verify.

We're not going to dress up thin evidence as solid science. That's not what we’re about.

So why did we build Savara around it

Because the evidence being limited is not the same as the idea being wrong.

We believe that different frequencies affect the body differently. Not as a theory we're tentatively exploring, but as something we feel to be true, and that shaped every decision we made in building Savara. The question was never whether to use 432 Hz. It was how to build a whole sound environment that honoured what it can do.

Different tuning systems have existed throughout history, long before the 440 Hz standard was adopted in 1953 and flattened the landscape into a single accepted pitch. 432 Hz is one that keeps returning, and there's a reason for that. Something about it feels more resonant, more at ease in the body. It’s softer around the edges, easier to be with for long stretches, and in our view is less likely to create the subtle fatigue that some sound environments produce over time. Parents are in that room too, and sound that actually feels restful rather than merely present matters for the whole family, not just the baby.

What we chose to do with it

We didn't just tune our recordings to 432 Hz and call it done. We built the entire sound environment around it. This included the layering of tones, the pacing, the way instruments interact with each other. The goal was a listening experience that feels coherent and complete, where the tuning is part of something larger rather than a standalone feature.

Whether you're someone who believes deeply in 432 Hz or someone who is skeptical about the concept, we think the result speaks for itself. Put Savara on in a quiet room and just notice how it feels.

That's always been our test.

Savara's three sound environments — 432 Hz tones, hang drum, and Tibetan singing bowls, cystal bowls and chimes — are recorded by real musicians and built into a portable, dedicated device. No apps, no Wi-Fi. [Find out more here.]