July 13-16. Now in its sixth year at the Yiddish Book Center under the artistic direction of Chronogram contributor Seth Rogovoy, Yidstock brings together musicians who fuse klezmer with elements of traditional Yiddish music, jazz, Americana, and other styles. In addition to performances by Eleanor Reissa and Frank London's Klezmer Brass All-Stars, the Andy Statman Trio, the Alicia Svigals and Lauren Brody Duo, Ezekiel's Wheels Klezmer Band, and the Hankus Netsky and Eden MacAdam-Somer Duo, the three-day festival will feature a reprise of London's multimedia oratorio "A Night at the Old Marketplace," which is based on I.L. Peretz's 1907 play of the same name, as well as related talks and workshops. See website for set times and ticket prices. Amherst, Massachusetts. (413) 256-4900; Yiddishbookcenter.org.