With DAN TRUEMAN, an associate professor of music at Princeton, on Hardanger fiddle; his wife, Monica Mugan, on guitar; Jason Treuting on drums, and Beth Meyers on viola, QQQ formed four years ago. This is the group’s first album. Inspired by Scandinavian folk music, American fiddle music, contemporary concert music, and bands such as Radiohead, its instrumental music is “tuneful, rhythmic, buoyant, and sometimes densely intense,” says Trueman. A Time Out New York critic wrote after one of the band’s gigs: “QQQ’s music resembled nimble, knotty prog rock; at other moments, it took on the trancey exuberance of klezmer and similar earthy folk genres.” To celebrate the Jan. 30 release of the CD, QQQ is performing at Joe’s Pub in New York City that night, and on Feb. 7 at Princeton’s Whitman Theater.