Musique concrète is a type of music composition that utilizes recorded sounds as raw material. (Wikipedia)
Sounds are often modified through the application of audio signal processing and tape music techniques, and may be assembled into a form of sound collage
The theoretical basis of musique concrète as a compositional practice was developed by French composer Pierre Schaeffer beginning in the early 1940s. It was largely an attempt to differentiate between music based on the abstract medium of notation and that created using so-called sound objects
Musical sound conventionally came from real instruments in dedicated environments, and performances often couldn’t even be recorded.
Going from an almost didactic concept of music to the mixing of sounds represented a journey into the unknown that would subsequently change not only scholastic concepts of musical arrangement but also listening habits and the very concept of what can and cannot be musical (including dissonances)
It is said that musique concrète was the first school of electronic music
Below are some other compositions from this phase
Étude au piano I (Étude violette),
Étude aux casseroles (Étude pathétique).
From 1949 Schaeffer began a collaboration with
Symphonie pour un homme seul. it is another example of concrete music in which instrumental sounds mix with sounds taken from the daily life of a man