Another musical movie, with Production Sound Mixer,Ronald R. Reise, "Rather than lip-synching to pre-recorded tracks, the performers all sang during filming to live behind-the-scenes musical accompaniment in the interest of maximum spontaneity and credibility"
this is Clint Eastwood's first musical as a director ...note that Clint was a star in a musical film, 'Paint Your Wagon', along with Lee Marvin (and both sang in it!) Though Eastwood didn’t have the best of luck with musicals as an actor, this property ought to have been well within his directorial wheelhouse. As a helmer, he’s always had an astute ear for music
quotes from Daily Variety and The Hollywood Reporter reviews.