This week marks the second session of “Rockabilly 2 Rachmaninoff,” a captivating new series of “In the Flamingo Lounge” dropping every two months on the second Saturday. Each episode promises unique insights, featuring a special guest from the Buffalo Philharmonic Orchestra. Joining us on the second episode of the “Rockabilly 2 Rachmaninoff” series, is Classical crossover tenor Jay Dref.