PT Journal AU Holubec, P SO Aura musica PY 2020 BP 18 EP 23 VL 12 IS 1 DE Pekka Kostiainen; Jaakobin pojat; tonality; atonality; aleatoricism; harmony; chord; cluster; timbre; melody; choir; interpretation analysis AB This contribution analyzes the choral score Jaakobin pojat from the point of view of the artist, choirmaster, especially with regard to less traditional ways of composition and interpretation. It also deals with the theoretical concepts of atonality, aleatoricism, cluster, which the author, Pekka Kostianen, uses in his composition. ER