Polish composer, musicologist and teacher Andrzej Koszewski was born in Poznań on 26 July 1922. He was a member of the Poznań Cathedral Choir (1935-9) and studied theory and composition in Poznań from 1946 until 1953, and then in Warsaw from 1953 until 1958.
From 1948 he taught in music schools, and from 1967 taught composition.
He wrote much choral music, often inspired by folk music. Later he used serial techniques and extended vocal techniques, including glissandi, whispering, shouting and whistling. His works were performed in Poland and abroad.
Koszewski died on 17 February 2015, aged ninety-two.