Boguslaw Schaeffer (Lwów, Ukrainia, 6 June 1929) is a Polish composer, a music theorist and a teacher. In Kraków he studied
musicology with Jachimecki at the university (1949–53) and composition with Malawski at the State Higher School of Music. He
was a music critic between 1953-59, but since then has devoted his time primarily to composition and teaching. He taught at the
Kraków Academy from 1963.
As a composer, he rapidly became the most fearless Polish proponent of new technical and aesthetic boundaries, particularly
with regard to notation and performance practice with over 400 works to his name.