Is the tape-recorded sound of a large metal-stamping machine music? Are 4 minutes (1) _______ 3 seconds of silence music? Is the activity of reading a (2) _______ of hundreds of seemingly unrelated objects, activities, and states of mind music? Each of these “(3) _______”, as well as many other sounds (or nonsounds), has been copyrighted (4) _______ a musical composition, performed, and recorded in the 20th century. One of the legacies of 20th-century music is to have blurred the definition of music as (5) _______ before.