HDCD. is it that good?

[Sir Terrence the Terrible]

I use an audio alchemy DTI32 16-24-bit interpolater/jitter reducer with a DDEV3.0 HDCD D/A with I2S cable and powered Data Steam Transmission co-ax cable with a Rotal RCD-1070 as one source, and HDCD is definitely an improvement.

Listen to Blue Man Group "Audio" HDCD
History of Horror- City of Prague Philharmonic orchestra (DD/HDCD recording)
Or any of the The DOORs remastered HDCD's

Nice stuff, but I have to ask. Are your sure it is the HDCD encoding, or just good mastering by the mastering engineer? From my experience, the better the live or studio recording and post mastering is, the less difference HDCD made on the end product.