Gearóid Ó hAllmhuráin, a leading authority on Irish traditional music, will present on his new book, Flowing Tides: History and Memory in an Irish Soundscape, on Sept. 13 at 6:30 p.m. at Connolly House, 300 Hammond St. Following his talk will be a concert. A cultural historian, anthropologist and ethnomusicologist, Ó hAllmhuráin holds All Ireland titles on concertina, uilleann pipes, and is a member of the Kilfenora Céilí Band. Registration in advance is requested. Sponsor: Center for Irish Programs.