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There comes a point in almost any scheduled performance by
Jon Batiste
when he pops up from the piano and strides into the crowd, tootling his
melodica, a toylike wind instrument, with bandmates in tow. It’s a
trademark shtick that happens to carry a whiff of the authentic, given
Mr. Batiste’s lifelong familiarity with New Orleans second-line parades.
Naturally, it was one of the factors that led to his role as bandleader
on “
The Late Show With Stephen Colbert,” which makes its debut on CBS on Tuesday.