Lewis Short
mŏdŭlātor (noun M) : id.
* 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.
Charlton T. Lewis, Charles Short, A Latin Dictionary