Joyce Brite asks, "Is a piano roll a recording?  Also, in light
of recent MMD discussions concerning MIDI, should that medium be
categorized as a recording?"

Actually, it is.   The copyright office classifies both as
"phonorecords."  MIDI only recently received that classification.
They are both subject to the mechanical license rules, same as CD's.

George Bogatko
http://www.inluxeditions.com/