Airs Tuesday, March 26 at 9 p.m. The tenor saxophonist John Ellis is a commanding instrumentalist with a most gorgeous, carmelized tone. And though he now lives in New York, his band gives away the fact that he learned an awful lot in New Orleans. A chunk of Double-Wide lives there — notably, Matt Perrine (sousaphone) and Jason Marsalis (drums) — and the Crescent City's carnivalesque and high-stepping timbres are refracted through Ellis' tunes. You can take the boy out of the South, but you can't take the South out of his musical vision. Joining him also are Gary Versace on organ and accordion and Alan Ferber on trombone.