Aurora runs beneath your entire library and shifts pitch reference on the fly — no re-encoding, no re-downloading, no quality lost in transit.
In 1939, an international standards conference fixed concert pitch at 440 Hz — a choice driven by industrial manufacturing consistency, not acoustics. 432 was already in wide circulation before that vote, and it's the reference point that lines up cleanly with simple whole-number ratios across the harmonic series.
We're not asking you to believe anything. We're asking you to notice what the numbers already do.
At 432 Hz, octave doublings and fifths land on cleaner integer relationships than at 440 — a property tuners and instrument builders measured long before digital calibration existed.
Instruments, tuning forks, and organs built across the 18th and 19th centuries were commonly set closer to 432 than to 440, before the reference was fixed by committee.
We don't tell you what 432 does. We built the engine that lets you sit with your own library at this reference and draw your own conclusions.
Aurora sits underneath every source on your device and re-references pitch in real time — locally, losslessly, without touching your original files. Local library, streamed audio, podcasts, all of it passes through the same signal chain.
"Standards are agreements. Reference points are older than agreements."
Free to install. Your files never leave your device. One reference point, applied everywhere you already listen.