In this gentle piece, Harp 1 and Harp 3 play melodies that compliment each other, while Harp 2 plays mostly arpeggio patterns; and there are no lever or pedal changes required. In Harp 1 at measure 60, pedal changes are suggested in order to play a chordal glissando. If Harp 1 is played on a lever harp, instead of a chordal glissando, F arpeggios can be played ad lib. Performance time for Call to Worship is about two and a half minutes, and it is also available in Worship and Wedding in Two Harps Together.
The arrangement comes with separate copies for First Harp, Second Harp, and Third Harp and an Ensemble Copy showing the three parts together.