FourThirtyTwo tuning test set
==============================

Original pieces synthesized for testing FourThirtyTwo's Auto-detect
(https://fourthirtytwo.app/guides/change-440hz-to-432hz.html#accuracy).
Each track was rendered at the exact reference tuning (A4) listed below.
You're welcome to use them to test any tuning detector or converter.

Tip: import a few into the app and run Auto-detect before you read the answers.



Answers
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Cathedral Air.mp3   A4 = 430 Hz   Pipe organ
Porch Light.mp3     A4 = 432 Hz   Strummed guitar
Slow Tide.flac      A4 = 435 Hz   Ambient bells
Night Circuit.mp3   A4 = 436 Hz   Electronic, detuned synths
Blue Hour.mp3       A4 = 437 Hz   Vocal ballad with vibrato
Paper Orchard.wav   A4 = 438 Hz   Drum groove
Lanternfield.mp3    A4 = 440 Hz   Piano ballad
Evensong.mp3        A4 = 441 Hz   Choir in just intonation
Quiet Meridian.m4a  A4 = 442 Hz   Pads and bells
Late Set.mp3        A4 = 443 Hz   Jazz trio
Copper Morning.mp3  A4 = 444 Hz   Piano étude
Iron Hollow.mp3     A4 = 446 Hz   Distorted rock
Four Rooms.mp3      A4 = 448 Hz   String quartet with vibrato
Concrete Bloom.mp3  A4 = 450 Hz   Hip-hop, 808 bass

Made by FourThirtyTwo, 2026.
