It should be mentioned that there are new recordings continually being released in HDCD. One reason is that many artists are not crazy about digital to begin with, and want the very best (Redbook playable) rendering of their performances.
And I'm guessing the lack of the HDCD identifier on albums will be corrected now Microsoft is handling things ;--)
Third, the HDCD process is improved, and Keith Johnson (the co-inventor of HDCD) has ressurected Reference Recordings, which has a large catalog of new releases using the ugraded process.
www.referencerecordings.com
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