It would eventually be premiered in September 7 , 1961 , at the Darmstadt International Summer Courses for New Music .
The composition was conceived and written in 1958 and won the second prize at the Polish Composers Union Young Composers Competition , in April 1959 .
composition would eventually be premiered in September 7 , 1961 , at the Darmstadt International Summer Courses for New Music .
The composition was conceived and written in 1958 and won the second prize at the Polish Composers Union Young Composers Competition , in April 1959 .