Music Computer -- See Computer music Here are entered musical works in which the sounds produced are intended to be generated or altered via digital technology and recorded or performed live. --Concertos, Sonatas, Suites, and similar headings with specifications of instruments; also Trios [Quartets, etc.] followed by specifications that include the computer; also Instrumental ensembles and music headings that begin with the words Computer or Computers
Music Concrete -- See Musique concrete Here are entered works in which the sounds produced were originally recorded on magnetic tape from natural sounds and subsequently rearranged or altered. The heading is used as a second heading when the tape is used with a specifically named medium of performance, e.g. 1. Quintets (Clarinet, flute, harp, viola, violoncello) 2. Musique concrete.