In the military, a CDC is a Career Development Course. It's like a series of home study books to help you in your career specialty, and advance in rank. gromit801 Â· 1 decade ago
Aleatoric music, also known as aleatory music, is music with a random element. Chance elements within a piece can be used for composition, as well as for live performance. When a piece is being composed, random elements can be used to influence the outcome of a final musical piece.
Also called chance music, aleatory music has been produced in abundance since 1945 by several composers, the most notable being John Cage Cage, John,1912â92, American composer, b. Los Angeles.