How would you feel being in one of the churches of Augsburg, Germany in 1591?
There you might have heard Laudate Dominum by Hans Leo Hassler, a polychoral motet performed by a double choir based on the words of 150th Psalm.
Each choir would be positioned on a separate balcony, creating stereo effect, sometimes singing in alternation, sometimes together (especially at the end).
Hassler learned this technique from Andrea Gabrieli in Venice, Italy the organist at St. Marco who wrote music for multiple choral and instrumental groups.
Can you imagine two choirs singing in this video?