Question: what composer used sound mass I found the following answer on Google: Other examples include European "textural" compositions of the fifties and sixties such as Krzysztof Penderecki 's Threnody to the Victims of Hiroshima (1959) and Gyorgy Ligeti 's works featuring micropolyphony in works like Atmospheres (1961) and his Requiem (1963-65). Is that a correct answer? Yes or no.
Answer:
Yes