What is walter simmons?

As an AI language model, I don't have access to all individuals named Walter Simmons. However, there is a notable Walter Simmons who was an American music critic, writer, and educator. He was born on June 2, 1930, in Chicago, and died on March 3, 1988, in New York City. Walter Simmons served as a music critic for the Boston Herald, spent many years as an editor for Musical America, and also taught music and humanities courses at universities. He authored several books, including biographies on important classical composers such as Roy Harris and Nikolai Medtner. He was known for his advocacy of contemporary classical music, including atonal and serialist works.