Loudness Check support
Getting started
In ChatGPT, ask something like "Is my song loud enough for Spotify?" or "Normalize my podcast audio." Loudness Check opens in the chat. Drop your file into it, or attach the file to your message.
Supported files
- WAV, FLAC, MP3 and AAC/M4A.
- Mono and stereo. Surround files (5.1 and up) aren't supported.
- At least 0.4 seconds long. Loudness range needs at least 3 seconds.
- AAC/M4A decoding depends on your browser. If a file won't open, export it as WAV or FLAC.
Targets
| Platform | Integrated loudness | True-peak ceiling |
|---|---|---|
| Spotify | -14 LUFS | -1 dBTP |
| YouTube | -14 LUFS | -1 dBTP |
| Apple Music | -16 LUFS | -1 dBTP |
| Podcast | -16 LUFS | -1 dBTP |
| EBU R128 | -23 LUFS | -1 dBTP |
Why did normalizing stop short of the target?
Loudness Check only changes the overall level. It turns the file up until it reaches the target or until its loudest peak reaches -1 dBTP, whichever comes first. If your peaks are already close to that limit, the file can't get louder without clipping. The app tells you how far short it is. To go further, use a limiter in your audio editor, then check the new version.
What do I get when I download?
A WAV file, 24-bit, at the same sample rate as your original, named like song_spotify_normalized.wav. Inside ChatGPT, the file is saved through ChatGPT's file storage and opened as a download link.
Is my audio uploaded?
Not to us. Files you choose in the app are processed on your device. Files you attach to a ChatGPT message, and normalized files you download inside ChatGPT, are stored by ChatGPT. See the privacy policy.
Contact
support@heyhaiden.com. Please include your browser, the file type, and what you expected to happen. Don't send audio unless we ask.