For me this came from the wonderful BBC. Praise be to them. As a student I
used to go to concerts at their various venues like BH, Maida Vale, St
Johns. Often hearing something live during the day and then hearing it
rebroadcast later on R3. On the early stereos I had the sound at home was
good, but it was only when I used better systems (particularly speakers)
and a decent room I discovered that the stereo imaging could indeed, give a
clear perception of depth and 'solid' location with good
broadcasts/recordings that really did faithfully convey the acoustics you
heard at the venues. Once you hear this it is amazingly clear. But it can
be very elusive to get at all unless you have excellent (in this respect)
speakers *and* a decent listening room arrangement.

And then they went an invented and implemented DAB;(...


--
Tony Sayer