It refers to the music that uses the tape recorder is commonly known as musique concrete or concrete music.

It refers to a musical style where music constantly sounds different at every performance because of the random techniques of production, including the use of ring modulators or natural elements that become a part of the music.

JOHN CAGE challenged a general thought of music by controlling instruments to accomplish new sounds and experimented with music with what came to be known as "chance music."

EDGARD VARESE was known as "innovative French-born composer."

Innovative inventions and discoveries of science and technology lead to developments in the music industry/field

Most of the sounds come from the surroundings, both natural and man-made, such as rustling leaves, honking cars, dripping water, blowing wind, or a ringing phone. The combination of external sounds cannot be replicated as each occurs by chance.

New Musical Style Electronic and Chance Music Composer. Select ONE. 

Most of the sounds come from the surroundings, both natural and man-made, such as rustling leaves, honking cars, dripping water, blowing wind, or a ringing phone. The combination of external sounds cannot be replicated as each occurs by chance.

What kind of music is this?

videoq:3QJPBWfBv7M: 0:27//Who is the prominent composer of this chance music?