Conversation so far:
What was the New York phase of Sun Ra's life?
After the move to New York, Sun Ra and company plunged headlong into the experimentalism that they had only hinted at in Chicago
What is Sun Ra's experimentalism?
Ra began to use new technologies—such as extensive use of tape delay—to assemble spatial sound pieces that were far removed from earlier compositions
What are some other interesting aspects about this article, besides defining the New York phase and experimentalism?
Seeking to broaden his compositional possibilities, Sun Ra insisted all band members double on various percussion instruments – predating world music by drawing on various ethnic musical forms

Question: What is free music
Self-contained rewrite: What is free music?