The sounds of Rockapella give ample proof that the human voice is the greatest and most diverse musical instrument. Fresh from the release of its studio album “Bang,” the five-man ensemble roars into the Hylton Center with “A Rockapella Holiday.” “The audience will hear lots of songs they know presented in a warm and fuzzy spirit but with an edge,” said spokesman Scott Leonard, who has been with Rockapella since 1991, the longest serving of the current members. “We’ll sing seasonal favorites in our own special way and a funky arrangement of ‘The Dreidel Song.’ Along with some other original compositions, there’s a brand new song for Kwanzaa.”

Tenors Leonard, John K. Brown and Steven Dorian alternate the melody line backed by bass George Baldi and vocal percussionist Jeff Thacher. Thacher, the one-man rhythm section, utilizes mouth-drumming, percussive throat grunts through a throat microphone, and a host of sounds most weary mothers will command a child to stop making.