There's even a new 70-CD box set out this month to commemorate the soprano's passing.

NPR: Maria Callas, The Legend Who Lived for Her Art

So, as far as I'm concerned, the release of his career-spanning, four-CD box set, "Tracks, " is a religious event.

CNN: Review: 'Tracks' follow Springsteen at the top

Everything has changed from 1995, put it on a CD-ROM, ship it in a box to the store and wait till you ever hear from a customer.

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Could it introduce downloading to a broader base of older music fans, much the way early CD box sets by Bob Dylan and Bruce Springsteen persuaded consumers in the mid-'80s to try the CD format?

FORBES: Music's Online Holdouts