Bogusław Julien Schaeffer

Bogusław Julien Schaeffer (also Schäffer) was a Polish composer, musicologist, and graphic artist, a member of the avantgarde "Cracow Group" of Polish composers alongside Krzysztof Penderecki and others.

Schaeffer was born in Lwów (now Lviv, Ukraine). After studying violin in Opole and graduating in musical composition under Zdzisław Jachimecki in 1953 at the Academy of Music in Kraków, he became an active composer and musical theoretician. From 1963, he was a lecturer on composition at the Kraków Academy, and he was a professor at the Hochschule für Music in Salzburg from the mid-1980s to 2000.

Konstancja Kochaniec was one of his students.

Read more at https://en.wikipedia.org/wiki/Bogusław_Schaeffer