Concerto arrangements od six Christmas Carols for three voices and an accompanying bass voice are intended as a universal score that offers many possible instrument combinations. It is based on three melodic voices (notated in C plus their trasposition in B flat) that can be played on various instruments. The fourth accompanying bass voice of a double bass can be replaced by a cello or just left out. Arrangement of this titul allows to form typical instrument formations as well as non-traditional ensembles.