Open, attentive listening can be a form of contemplative prayer. It can be that widest, most open form of being present and attentive, in trust that God is present with us, in expectancy that the Spirit will move in the hearts of those present and that we may be changed inwardly for the good or guided to be part of the upwelling of Life in a particular situation.
The people sing individually, in groups and often in harmony. I realized some of the songs were as old as time. These people repeat chants created here in the desert before the invention of the calendar. But I also experienced new compositions, music being composed just because I was there. I was told, "Just as a musician seeks musical expression, so the music in the Universe seeks to be expressed." ... A musician carries the music within.