I would like to write out the loudness tags myself but the values I'm getting with a ReplayGain v2 compatible tool are different from those in my collection. So I'd like to know what exactly `ANALYZED_DB`, `PEAK_DB` and `PERCEIVED_DB` represent.
This is the question I asked support but I got a "I'm afraid we do not have access and cannot share that kind of information." so I'm asking over here.
In general I'd really like to get some more info about the workings of the nml database, I'm currently writing some scripts to automate some stuff but having to reverse engineer the nml file is really cumbersome/ unfeasible for me.