Isaacson was conducting the first rehearsal of the season. During a series of fall concerts, Classical Uprising would perform ancient Roman Catholic liturgical chants and Duruflé’s Requiem with unexpected changes in rhythm and tempo reminiscent of avant-garde 1950s and ’60s composers. Dramatic lighting effects, inspired by Phish concerts and Taylor Swift’s Eras tour, would heighten the emotional impact of the music. “The theme of a lot of classical concerts is, ‘We’re going to take you back to this specific moment when Schubert wrote this quartet,’” Isaacson says. “This is more like a time-travel experience, where we’re transporting you from the ancient world to the now by playing with the music in a modern way.”