I think I get better sounding in my car stereo on iOS 15 Beta compare to iOS 14.7.
I listen to the same song “Trust” and “Almost Honest” (Megadeth) on my iPhone X running iOS 15 beta and iPhone 11 Pro Max running iOS 14.7.1 — oh boy! iOS 15 output was really clean and clear and you can really hear the details of the song. I discover the missing details of the song and now I listen to the song as if it was a new song again!
Matsuri is one of those music that (in my opinion) will make you appreciate the sounds of music perform on a traditional instrument. To enjoy the music and hears every detail you needs something like CDs quality. I am blown away listen to this song on Apple music (lossless) on iOS 15 beta compare to iOS 14.7.1
Day 2 This morning I try to listen to the same music again — it seems the good sounding experience last night has gone. The music seems off and flat.