Nothing gets fans of Ohio-based jam band O.A.R. more furious than if you mistakenly call their beloved music group “oar” (as in paddle). Sure, performing under “Of a Revolution” could put a stop to such headaches. But the band’s been too busy enjoying its existence as a well-regarded live act. With its seventh studio album, “King,” scheduled for release in August, O.A.R. performs at Innsbrook Pavilion on Tuesday, July 12, at 6 p.m. $17-$75. 794-6700.