Thanks all for the comments and suggestions. Airplay delivers Red Book spec. That’s what turned the corner for me since most of my 1500 or so CDs are “Regular” CDs. My small collection of SACDs I still spin in my Marantz Blu-ray player.
Relative to the post, my AB tests were against CDs in my collection vs streamed by Roon.
Agreed that poor remastering is what causes bad sound. Amazon is not the culprit- just the delivery method.
Interesting post…