This motet comes from Trombetti’s Il Primo Libro de Motetti, (Venice, 1589). Trombetti was a cornetto player who worked at San Petronio in Bologna. Several of the pieces in the collection are headed da concerto, presumably indicating a mixture of voices and instruments. All of his pieces work extremely well on cornetts and sackbuts, as one might expect.
(Bernard Thomas)
Cantemus Domino; gloriose enim magnificatus est, equum et ascensorem proiecit in mare. Fortitudo mea, et laus mea, Dominus, et factus est mihi in salutem. (Exodus c. 15)
Let us sing to the Lord; for he has done great and glorious things, horse and rider he has hurled into the sea. The Lord is my strength, him I extol, and he has become my salvation.
(I am grateful to Nigel Coulton for providing the translation)