Marin Alsop on the moment she decided she wanted to be a conductor, after encountering/watching Leonard Bernstein as a 9 year old at a Young Persons Concert. This week’s podcast also includes conversations with two great musical partnerships; the French pianist Louis Lortie and violinst Augustin Dumay, as well as the pianist Inon Barnatan and the cellist Alissa Weilerstein, who first began performing together during a cold Boston winter…