If this helps
A dominant chord is a major triad built on the fifth scale degree of either a major scale or a minor scale. Major triads consist of a root note, a major third, and a perfect fifth. ... A simple D major triad contains the notes D, F♯, and A. This chord becomes a dominant seventh chord (V7) by adding the note C.
My best guess would be a Cornetto It is more than likely an instrument from the renaissance era if not the Cornetto
Very suscesful music I think
