PT - JOURNAL ARTICLE AU - Hána, Luboš TI - DP - 2013 Sep 30 TA - Aura musica PG - 28--33 VI - 4 IP - 2 IS - 18054056 AB - The contribution deals with evolution of own choir from youth choir into an adult choir. It is based on 15 years experience with founding and conducting the choir. The author of the study tries to formulate choirmaster competences needed for conducting a choir. He shows the necessity of changing repertoir and the way of choir work to current social situation and abilities of its members. The level of the choir (which is mathematicaly "ungraspable") is described with hyperbole to Einstein Special Theory of Relativity.