modulatory,a.|ˈmɒdjʊlətərɪ| [ad. L. type *modulātōri-us, f.modulārī to modulate: see -ory.] Pertaining to or serving for modulation. 1880Parry in Grove Dict.Mus. II. 348/2 [Bach's] more wonderful modulatory devices must have fallen upon utterly deaf ears.