Bogusław Julien Schaeffer

Bogusław Julian Schaeffer (also Schäffer) was a Polish composer, musicologist, and graphic artist, a member of the avant-garde "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 with a degree 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 Musik 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