Don Pearce wrote in message news:49910a41.398311562@localhost...

It is pretty much impossible to compare CD to SACD. You will hear
differences, but they are nothing to do with the medium, but rather
the mastering of the recording. SACD releases are, I'm afraid, rather
closely associated with the "smiley face" eq curve which places
greater emphasis on extreme bass and treble. The result is a sound
with a little more fizz and thump which can in the short term sound
better - it soon gets tiring though, I'm afraid.

A relevant comparison that is easy to do, which involves playing a SACD or
DVD-A. Intermittently and under listener control t a device is inserted
that transcodes the "Hi rez" data into CD format. This has been described in
at least two AES papers, and the result was that experienced listeners could
*not* detect the insertion of the transcoder in a blind test.

This test has also been done with live analog music in a recording studio on
several occasions. Same results.

I'm not sure how rapid the adoption of mp3 is for classical music is. It
strikes me that this is the one area where physical media might survive
longer, with the importance of the sleeve notes, particularly the
libretto. But when the CD shops go, I suppose all that will go too.

Brick-and-mortar stores selling music only or music primarily, have
completely disappeared in most parts of the US. Pre-recorded media is still
sold over the web or in regional superstores.