These two psalms with lyrics adapted by Polish poet Leopold Staff (1878-1957) are both David’s Psalms – no. 141 Voce mea ad Dominum and no. 150 Laudate Dominum – and were commissioned by Stanisław Moryto for the VIII Organ Festival in Koszalin. The music both in vocal and organ part is influenced by the poetical text and illustrates its dramaturgy. The free technique is characterised by combined tonal and atonal elements.