
loudness CORRECT · Normalizer
LUFS · True Peak · R128 · ATSC
About
This app measures, corrects, and verifies audio files to meet broadcast and streaming loudness specifications offline. It offers transparent loudness range control and true-peak limiting for professional audio production on iPad and iPhone.
What's New in loudness CORRECT · Normalizer
1.1.1
August 31, 2026
Now on iPhone as well. One app for iPad and iPhone, with a reworked interface in the pegelWERK design. MEASUREMENT True-peak measurement now follows the coefficients in ITU-R BS.1770-4 Annex 2 exactly. Earlier versions read low on high-frequency material, by up to 2 dB in the worst case; on speech and most music mixes the difference was in tenths. If you normalised close to a true-peak ceiling with an earlier version, it is worth re-checking those files. The corrected file is now sample-aligned with the source and the same length. It used to sit up to 15 ms late. Loudness Range follows EBU Tech 3342 more closely. EBU R128 s1 now limits Maximum Short-term Loudness to -18 LUFS as the standard defines, instead of capping Loudness Range, which the standard explicitly excludes. HANDLING Results are no longer overwritten; they are numbered. Large files no longer freeze the interface while importing. The finished file can be shared straight from the app.
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FAQ
What is loudness CORRECT?
loudness CORRECT is an offline application for iPad and iPhone that measures, corrects, and verifies audio files to meet broadcast and streaming loudness specifications. It ensures your audio output is precisely on target.
Does loudness CORRECT have ads?
No, loudness CORRECT is an ad-free application. Your audio files remain on your device as it does not require network calls.
What loudness standards does loudness CORRECT support?
loudness CORRECT supports numerous standards including EBU R128, ATSC A/85, Apple Podcasts, Spotify, Amazon Music, and YouTube, among others. It also allows for fully editable custom presets.
Can loudness CORRECT handle multichannel audio?
Yes, loudness CORRECT supports multichannel audio from mono and stereo up to 9.1.6 Atmos layouts, with BS.1770-correct processing per layout.
What audio file formats can loudness CORRECT import and export?
It can import WAV, AIFF, FLAC, OGG, MP3, and M4A files. Output formats include WAV, AIFF, and FLAC.
How accurate is the audio correction in loudness CORRECT?
The app features verified output that auto-verifies and refines audio until the residual error is under 0.1 LU, ensuring precise results without manual re-checking.
What devices is loudness CORRECT available on?
loudness CORRECT is made for iPad and iPhone, offering a focused UI for professional audio tasks on these devices.
How often is loudness CORRECT updated?
The latest version is 1.1.1, last updated on August 31, 2026. Updates are provided to maintain compatibility and introduce improvements.



