Listening!

The difference between uncertainty and indeterminacy can seem subtle and elusive when people are talking about particle physics. When we’re talking about music, however, the idea of being “uncertain” seems just strange, and “indeterminate” is reasonably clear. John Cage probably remains the best-known composers of indeterminate music, music that evolves, comes into being, in the time of being played and heard.
The image is Cage’s Fontana 03