We had planned on Hassler's Gloria super Dixit Maria tonight for a St Stephen's Day Mass, only to learn yesterday a priest was unavailable. In the event we performed the rest of the mass (& the (and prelude/postlude/carols) with 10 singers, 3 sackbuts, cornetto & dulzian for a few parishioners who missed the cancellation notice. A awful lot of fun for 45' of rehearsal time!
Praetorius is one writer on the subject. Later on you can find independent choirs of instruments in some of Schütz's Opus 2 and the mass movements of Gabrieli.
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