The style of occasional music.

There are many styles of accidental music, such as J Cage, the founder of accidental music, whose earliest accidental music work Variations, the pitch and duration of its score are determined by China's Book of Changes and San Qian's hexagrams. Cage claims to exclude personal taste, memory and artistic tradition from music, and he also introduces a lot of noise into music. For example, in "Imagined Scenery No.4" written by 195 1, he used 24 people to control 12 radios, and each radio constantly changed the radio station and changed the volume according to the provisions of the music score, thus obtaining previously unknown sound. 1954 piano music "33 minutes 46.776 seconds" by Cage in collaboration with others. When playing, two pianos are used, and rubber, nails and other objects are stuffed into the strings at any time. In order to eliminate "objectivity in creation", Cage and his followers made sounds by squeezing and slapping. In addition to using maps, constellations, waste paper, etc. As the basis of creation, the intonation, dynamics and orchestration of works are all determined by divination, dice rolling and coin tossing. His most extreme works, such as Four Minutes and 33 Seconds, claim to be played with any "musical instrument", but in fact, the performer is only silent for four minutes and 33 seconds on the stage, and any sound that occasionally appears during this period is regarded as "music". Another example is "Concert of Piano and Band", which has no music score, but only a lot of music scores. Players can choose any music score at will and play in any order or even not. K Stockhausen's first piano piece 1 1, full song *** 19. When playing, you can reverse the order at will, and choose any one according to the specified speed, strength and touch mode. I. Kesenakis, a French composer, used the law of probability and game theory in mathematics in his creation, calling himself "random music" to distinguish it from accidental music.