[MLA] Loudness normalization with MQA

[Grimm | Eelco]

> Hey guys.... you probably know my prejudices:  Use album loudness data all the time. If you listened to the demo that I produced you would have no question about that.

The question is: replaygain has two fields of loudness metadata: one for track loudness and one for album loudness. Unfortunately many services just read the track loudness metadata. We _could_ advice Tidal to write the album loudness values in the track loudness fields. What's your opinion on that?

All the best,
Eelco