On Wed, 17 Feb 2016 12:36:05 -0500, "Mr. Luddite"
wrote:

Many people don't realize
that AM radio's bandwidth is limited to 10Khz

That is why most records made in the 60s and earlier sound like they
do. They were mixed to play on the radio. It wasn't until "hi fi" LPs
came around that you started getting decent sound. Even those got
"remastered" for CDs. When you play old tunes on a good system that
limitation becomes immediately apparent. I doubt the original source
material even exists to remaster them in a lot of cases. I suppose
they can try to expand the sound digitally but it will just be a guess
about what it was supposed to be.