Is hdcd worth having ??

Check out hdcd.com and you will be surprised how many CDs are mixed in HDCD and don't even make reference on the jewell box. I like the fact my CDP has the chip, it does make a difference.

HDCD comprises about 8 different parameters, with some/all used [or not] by the mastering labs of the world. And encoding is not always denoted on the jewel case, as mainiac states. Yes, it does make an audibly superior presentation but I wouldn't go out of my way solely for that feature. There's a lot more to satifying playback than a chip and software. But there's no denying Professor Johnson's aural acumen. The Denons sure look the business. Good luck.

So, if it is not denoted on the jewel case, how is a person to know if it is HDCD? Also,why is Denon and others including this feature in their players if it is basicaly a dead format (no longer being produced)?

A big yes for HDCD. Anyone doesn't hear the difference between regular redbook and HDCD disc should have their ear check!

HDCDs are still being produced. See, e.g., the most recent Grateful Dead reissues.