loudness CORRECT · Normalizer

loudness CORRECT measures, corrects and verifies your audio to any
broadcast or streaming loudness spec — fully offline, on iPad and iPhone.

Pick a file, pick a preset, correct. The two-pass pipeline measures
the source to ITU-R BS.1770-4, plans the gain move, writes a new file
and re-verifies the result — so what leaves the app is provably on
target, not just close.

WHY IT'S DIFFERENT
• Verified output: auto-verify and refine until the residual error is
under 0.1 LU. No guessing, no manual re-check.
• Transparent loudness range control: a continuous 3-band reshape
(Linkwitz-Riley) works toward the programme level — it tightens loud
passages and lifts quiet ones with no threshold and no pumping.
• True-peak safe: 4× oversampled inter-sample peak limiter with 5 ms
look-ahead keeps you under the ceiling on every platform.

14 DELIVERY PRESETS
EBU R128, EBU R128 S1, ATSC A/85, ARIB TR-B32, AGCOM 219/09,
FreeTV OP-59, DPP UK, Portaria 354, OTT -27 LUFS, Apple Podcasts,
Spotify, Amazon Music, YouTube, and a fully editable Custom
preset.

MULTICHANNEL
From mono and stereo through 5.1 and 7.1 up to 9.1.6 Atmos bed
layouts — BS.1770-correct per layout, with LFE exclude and proper
surround weighting.

FORMATS
Input: WAV, AIFF, FLAC, OGG, MP3, M4A
Output: WAV, AIFF, FLAC

• K-weighted ITU-R BS.1770-4 measurement (integrated, range, true peak)
• Dark, focused UI — German and English
• No account, no login, no network calls — your files never leave your device

MADE FOR
Mastering engineers, broadcast and post editors, podcast and audiobook
producers, sound designers — everyone who has to hit a delivery
loudness target quickly, cleanly and provably.