M / mŏdŭlātor
noun

mŏdŭlātor

gen. mŏdŭlātōris · gender masculine · decl. 3rd
one who measures by rule, a director; a musician poetic
one who measures by rule, a director of music, a musician (poet. and post-Aug. prose).—Absol.: optimus est modulator, Hor. S. 1, 3, 130: vocis et cantūs, Col. 1 prooem. § 3.