Default settings, but clearly Dolby Atmos on Apple Music's app is significantly louder. As far as I can tell both Tidal and Apple Music attempt to normalise your playlist so the perceived volume difference between tracks is less-noticeable. This Elton John track is the only track in the playlist though and nothing else was played after restarting the phone. I don't think there's a way to enable or disable normalisation on either app I can find.