Medium Voice,Vocal Solo - Level 1 - Digital Download SKU: A0.981566 Composed by A. Caldara. Arranged by Helios D'Andrea. Baroque,Instructional. 2 pages. D'Andrea Helios #6718953. Published by D'Andrea Helios (A0.981566). The original piece of music was facilitated and reduced, especially in the accompaniment part, then it was transcribed and transported in the key of a minor.