The master of Hard Knocks (CO-11) from March 2 was originally deemed unsuitable by Paramount, so it was dubbed down to a backing track by removing Elvis' vocals. Elvis then recorded a new vocal overdub to this backing track on March 5, with the master vocal being Take 4. The second version was used in the movie.
The movie version of It's Carnival Time
is a different vocal overdub take to that of the
record version, and that same version appears
twice in the movie, one with instrumental overdubs
of the intro and one edited version. In a letter
dated March 6 1964, it is indicated that Paramount
were not happy with Elvis' original March 5 vocal
on It's Carnival Time, so Tom Diskin promised
Paramount that Elvis would record a new vocal
to the song. It is unknown exactly when that session
took place but it was sometime between this session
and before March 24, when a new tape dub ("Short
Version") was made for Paramount.
In March of 2007, Sony decided to go through
all of Elvis' masters. They retransferred everything
and remastered all tracks including repairing
as many clicks, pops, bad edits and dropouts as
they could. They have used these newly mastered
recordings on their new releases since 2007 including
budget soundtracks, 'Legacy' releases, the 30
disc 'Complete Elvis Presley Masters' collection
and the Franklin Mint package.
Thanks to Ernst Jørgensen and Erik Rasmussen for information
regarding these vocal overdubs.