TIDAL publishes one volume normalization number via their API. This article is announcing that they changed the meaning/computation of that number from being a “track” value to an “album” value. Since they have rolled it out, Roon is now using the new number.
In general: Roon has three modes–album,track,auto. For TIDAL these always did the same thing since we didn’t have separate album/track values to work with. That’s still true after TIDAL’s change, but now the behavior is like “album” not like “track” because they changed the values.
Otherwise, our volume normalization implementation/approach is exactly like what is described in that article. I had a conversation with Eelco Grimm a little over a year ago, and we used the same techniques he recommends in the MLA resources. This has been in place since 1.3 was released in February.