Classical Revolution Pittsburgh performs Austrian early Romantic composer Franz Schubert's 1824 octet tonight at 7 p.m. at Bar Marco.

Classical Revolution is a chamber orchestra featuring members of both the Pittsburgh Symphony Orchestra and the Pittsburgh Opera. And to match their radical-sounding name, they’ve got a mission statement that reads in a decidedly punk-rock way.

Their goal is bring classical music to the people by taking it out of the concert hall and doing free concerts in venues like Bar Marco, where musicians and non-musicians, classical novices and afficionados alike can relax, eat, drink and enjoy music from all eras of history. They hope to isolate the power of music while avoiding all the stuffiness, rigidity and pretense that often comes with it.

Inspired by Beethoven’s then-20-year-old septet, Schubert composed this octet during his creatively vital late period, and you can see it performed tonight at Bar Marco (2216 Penn Ave., Strip District).