APEX for iPhone and iPad

Verify a master

Every master APEX exports comes with a certificate: the measured loudness, true peak, the chain in order, the Preflight results, and the SHA-256 of the file. Drop the file here and paste the hash. If they match, the file is byte-for-byte the master those numbers were measured from. The hash is computed in your browser and the file never leaves your computer, which is the same promise the app makes.

1 · The master

Drop the exported file here, or tap to choose it.

It is hashed in your browser. It is not uploaded.

2 · The certificate

Paste the SHA-256 printed under PROVENANCE on the certificate (both lines, spaces are fine).

What a measured master means

APEX masters on the device from a measurement of the file, shows every move with the number it read, and measures the result off the render. The certificate is that measurement, signed by the hash of the file it describes. Change one sample and the hash changes. That is the whole mechanism: no account, no server, no trust required beyond arithmetic.