The poets have said that by singing the angels induced the soul to enter the human body. The soul that has always been free is unwilling to enter the body. Really before its incarnation the soul is sound. It is for this reason that we love sound. The breath, the speech, the step, all have rhythm. Religions have all made music part of their worship. The Sufi especially loves music, calling it Ghiz-i-ruh, food of the soul.