Sorry if I wasn't that clear, I wrote the original post pretty late last night.
What i'm wondering is if any of the music I download from iTunes match to my iPhone, being downloaded at lower bitrates? All my music is either iTunes store bought 256 or cd ripped 320 kbps.
The reason I'm asking is because yesterday I was playing music through bluetooth from my iPhone to bose soundlink mini and the music sounded really bad and distorted. I then connoted the same speaker through bluetooth to my mac mini and played the same music and it sounded perfect.