Stephen Sondheim finding a real synthesis. A good deal of pop music has interesting lyrics, but they are not theater lyrics". A musical-theatre composer "must have a sense of what is theatrical, of how you use music to tell a story, as opposed to writing a song. Jonathan understood that instinctively." Around 2008, Sondheim approached Lin-Manuel Miranda to work with him translating "West Side Story" lyrics into Spanish for an upcoming Broadway revival. Miranda then approached Sondheim with his new project "Hamilton", then called "The Hamilton Mixtape", which Sondheim gave notes on. Sondheim was originally wary of the project saying he was
Stephen Sondheim write for the theatre, so I wanted someone who did not disdain theatre music." Barrow suggested that Sondheim study with Milton Babbitt, who Sondheim described as "a frustrated show composer" with whom he formed "a perfect combination". When he met Babbitt, he was working on a musical for Mary Martin based on the myth of Helen of Troy. Sondheim and Babbitt would meet once a week in New York City for four hours (at the time, Babbitt was teaching at Princeton University). According to Sondheim, they spent the first hour dissecting Rodgers and Hart or George Gershwin or studying Babbitt's