Loudness analysis?

victor's Avatar


05 Feb, 2019 04:28 AM

I thought BeaTunes could do loudness analysis, but I can't find any trace of how it works on the web site. Can someone give me a link?

(Is there an actual manual somewhere?)

Specifically, when the analysis is done, how can I tell from an mp3 file in iTunes how it was evaluated?

  1. Support Staff 1 Posted by hendrik on 05 Feb, 2019 08:17 AM

    hendrik's Avatar

    Hey Victor,

    beaTunes can do loudness normalization by adding ReplayGain (and iTunNorm) tags to the file. It does not change the the file in any other way.

    iTunes does not honor ReplayGain tags, but only iTunNorm tags and only when SoundCheck is on. So the first thing you need to do is turn SoundCheck on in iTunes (preferences -> playback). Then analyze your files using beaTunes for ReplayGain. To see the suggested gain, select a file in iTunes, open its Song Info dialog (⌘I), and go to the File tab. There you should see the gain adjustment in dB in the line volume.

    Hope this helps,


  2. 2 Posted by victor on 05 Feb, 2019 02:11 PM

    victor's Avatar

    Can I send you a track? Somehow the volume is marked as minus 9 db which makes it very soft. It’s not a loud track to begin with.


  3. Support Staff 3 Posted by hendrik on 05 Feb, 2019 04:28 PM

    hendrik's Avatar

    Sure. But what should I do with it?

  4. 4 Posted by victor on 05 Feb, 2019 11:59 PM

    victor's Avatar

    Figure out the bug in your software that makes it lower the volume.


  5. 5 Posted by victor on 06 Feb, 2019 12:06 AM

    victor's Avatar
  6. Support Staff 6 Posted by hendrik on 08 Feb, 2019 09:22 AM

    hendrik's Avatar

    Which algorithm and settings did you use?

    • For ReplayGain 1 and standard target level of 89dB SPL, I get a gain of -5.6dB.
    • For ReplayGain 2 with standard target level -18 LUFS, I get -4.78dB, which is in line with what Foobar2000 produces.

    My guess is that you set a target level that does not fit your expectations.

  7. Support Staff 7 Posted by hendrik on 08 Feb, 2019 09:45 AM

    hendrik's Avatar

    (Is there an actual manual somewhere?)

    Yes. Once you've started the application it's under the Help menu. Admittedly, this is not 100 pages of prose, but all the basics are covered. Just to illustrate, I have attached a screenshot of the info about ReplayGain.

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