A monochord, also known as sonometer[citation needed] (see below), is an ancient musical and scientific laboratory instrument, involving one (mono-) string...

monochord-like nature of a fully fretted clavichord (It. monacordo or monocordo; Sp. monacordio). Italian also used sordino, a reference to its quiet...

musicam, multo ante Galliis ignotam, notissimam effecit. Cujus genera in monocordo disponens, eorum consonantias sive simphonias in tonis ac semitoniis,...