After listening to a ton of Apple Music for the entire week on my HomePod, I returned to my normal life on listening music at other places. Case in point: my car stereo. I was listening to one of the "Essentials" playlist at home, and since I was in the same mood, I went to my iPhone, selected the same playlist, connected the phone to my car stereo and went my merry way. But I noticed the sound was... different. Different from what I just heard from the HomePod, and different from what I used to remember the songs. It seemed like lead singer's voice was echoing. And the mids were crispier, not in a bad way, just -- again -- different. The only thing clearly different was with all Album names prefixed with "(remastered)", and the notes "This album is Mastered for iTunes" before even proceeding to talk about the band or artist. So I went back to my old library, selected the same "non mastered" album, and it indeed sounded different - just like I used to hear! This made me wonder "what about my non-mastered songs on the HomePod"? Guess what, they too sounded different from the "remastered" version: less clear, maybe muddy - as others have reported on their HomePod reviews. I spoke to a few friends and they too confirmed this feeling. Seems the "Mastered for iTunes" is the missing link on why music on the HomePod is sounding too good to be true.