RT Journal Article SR Electronic A1 Holubec, Pavel T1 JF Aura musica YR 2020 VO 12 IS 1 SP 18 OP 23 UL https://aura.ujep.cz/en/artkey/aum-202001-0003.php 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.