In most branches of Christianity, there are choirs, solo song or even Christian rockbands. I remember reading that in the case of Christianity most people where illiterate when they started making psalms, hymns and songs.(before making stained glass to even make the visual part taken care of).
Is Christianity the first to incorporate this so widely into their religious structure? If not my question would be which would be the first? And as a bonus is there any record of this First Song (or lyrics)?