One of the best musical moments (and there were many) in the hit movie O Brother, Where Art Thou was the mass baptism scene when all the congregants sang &ldquo,Let's go down to the water to pray...&rdquo, with thatincredible southern harmony. Pepper Choplin has taken that wonderful spiritual and set it for SATB a cappella voices. A few additional lyrics have been added, providing an extra verse, but the style and simplicity of the originalhas been maintained. &ldquo,Down to the Water to