Around 1932 Levant began composing on a serious note. This led to a request by Aaron Copland to play at the Yaddo Festival of contemporary American music on April 30 of that year. Successful, Levant began on a new orchestral work, Sinfonietta.
During the years of 1958 and 1960, Oscar Levant syndicated his own talk show, The Oscar Levant Show. The show was highly controversial, finally being taken from the air after a comment in regards to Marilyn Monroe; 'Now that Marilyn Monroe is kosher, Arthur Miller can eat her.' He later refuted he "hadn't meant it THAT way." Several months later, the show was rebroadcasted in a slightly revised format. The show was now taped to use as a buffer to Oscar's antics. This however, failed to prevent Oscar from making some comments of Mae West's sex life, cancelling the show for good.
Oscar Levant drew increasingly away from "starlight" in his later years.
"A few years ago someone suggested that I read Spinoza. The first chapter in this patricular volume was about superstitions and rituals. Here was my faith! Spinoza said rituals are all based on fear. My faith destroyed, I put down the book."
"When Frank Sinatra, Jr, was kidnapped, I said, "It must have been done by music critics."
"Not long ago, a well-known Hollywood savings-and-load millionaire intruded on a conversation at my table at a restaurant. Worst still, he implied that he and I were equals. "Compared to you, I'm a Hapsburg," I told him. But it didn't offend him. He thought Hapsburg was a rival local banker."