ECM finally on Tidal is fantastic. There is however a huge drawback. It seems that ECM has included an audio watermark in every album. Have you notised that the sound «shakes and shimmers» a bit? That´s the watermark. (Google it) It´s not super apparent in every song, but for me it´s very annoying. Almost unlistenable. One example is Serenity by Bobo Stenson Trio. Try the second song and listen to the long piano chords. Sounds like a shaky lesly effecy.