September 6, 13, 14. Uh-oh. Those horsehair bows are sure to be a-flailing between the organizers of this Connecticut concert series and Woodstock's Maverick series: Both claim to be America's oldest continuing chamber music festival. (For the record, Maverick began in 1916, while Music Mountain was founded in 1930. Just sayin'.) Regardless of any friendly rivalry, though, it's the music that's the focus for both. Music Mountain, which began its 85th season in June, is finishing out 2014 in fine style with the Broadway revue "No Tune Like a Show Tune" (September 6), the Dover String Quartet with violist Roberto Diaz (September 7), folk and bluegrass by Tater Patch (September 13), and the Cassatt String Quartet with pianist Ursula Oppens (September 14). See website for ticket prices and set times. Falls Village, Connecticut. (860) 824-7126; Musicmountain.org.