Again, Carnegie Hall provided a new piece, “Fly by Wire,” by Tyondai Braxton, a multi-instrumentalist known for his work in the math-rock band Battles and a composer now in demand for high-profile engagements. Mr. Braxton’s piece flitted among styles with a cartoonish energy. But his leaps never felt abrupt: fidgeting strings, chattering percussion, a flatulent trombone and a cinematic gallop in triple time coexisted peaceably in his playfully surreal conception. That seven-minute premiere shared the concert’s first half with three works of similar concision. “Journeyman,” by the Alarm Will Sound pianist John Orfe, opened the program with a gleaming Neo-Classical integrity — all tart harmonies, deftly balanced timbres and assertive beat.