The Exultate Jubilate is a three movement motet consisting of an allegro movement followed by a slower andante movement, then another allegro movement known as the "Alleluja".
The two allegro movements are sung here by male soprano Michael Maniaci. Maniaci is a true male soprano and not a counter tenor or a castrato. This is the closest the 21st century ear will ever hear to how this piece sounded when Rauzzini sang it.