Uh, the article you indicated does not mention any music service specifically. I use Tidal integrated with Roon and have not noticed any overt compression or undue Normalization. BTW, I studied music recording in college at the Newhouse School of Communications and understand things like compression and normalization. Many but not all professional recordings are compressed/normalized at some point in the chain whether at the recording or the mastering. Just the act of cutting an LP incurs things like bass summing and other techniques to fit the medium. With the advent of CD and a much wider dynamic range, there was the opportunity to be much more gentle on the mastering end and be more purist. Even so most recordings still have some form of Normalization even if to just utilize all 16 bits of the CD spec. I would assert that a very wide dynamic range recording could be difficult to listen to at home because you would crank up the volume to hear the very quiet bits and then be blasted out of your seat at the crescendo.
The Loudness Wars thing refers to a trend from years ago to compress the music beyond recognition to sound really loud when played back on crappy stereos. You can see this if you bring up a digital wave file in an editor like Audacity, etc and you will see just a straight line without peaks and valleys. All of this actually started with the implementation of things like the Optimod Compressor that was widely used by music radio stations to help them stand out. The idea was the louder your radio station the more likely a person would stop on your frequency when dialing through their radio receiver.
I think you can be safe with either Tidal or Qubuz currently. Maybe Amazon HD as well.
I was initially "smitten" with Tidal and MQA, but now I'm pretty much "Swiss" on the new format.
Some of the rock and roll mastered on MQA does seem to sound more "present" and "fuller", especially in the bass region. Some of the classical MQA masters to me don't sound as good as the CD quality masters, a few of the selections I like sound downright "dull".
When Qobuz became available, I added it to my Roon account and was able to do some compares and for those rock and roll selections that sounded "fuller", I must say, they DO sound louder, probably because the mastering engineer chose to accentuate the bass.
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