I hadn't noticed until a few days ago why newer music didn't feel as good as some old music (aside from the fact that many newer music is in fact crap), and why some re-releases didn't seem to sound as good as it used to. I thought I was mad, but now I know the reason:
http://www.proaudiorx.com/dynamicrange.htm
Rather than use this new technology to take advantage of it's wide dynamic range, the music industry went in the opposite direction. They decided that louder is better. Suddenly, we found ourselves in a race to see whose CD was the loudest. The only way to make CDs louder was to keep compressing the signal more and more. That's where we are today. Everyone's trying to make their CD sound louder than everyone else's. The term that is used for this process is called, hot. Yes, most of today's music is recorded hot. The net result, noise with a beat.
http://www.proaudiorx.com/dynamicrange.htm