Tromba marina

A tromba marina, or marine trumpet (Fr. trompette marine; Ger. Marientrompete, Trompetengeige, Nonnengeige or Trumscheit, Pol. tubmaryna) is a triangular bowed string instrument used in medieval and Renaissance Europe that was highly popular in the 15th century in England and survived into the 18th century. The tromba marina consists of a body and neck in the shape of a truncated cone resting on a triangular base. It is usually four to seven feet long, and is a monochord (although some versions have sympathetically-vibrating strings). It is played without stopping the string, but playing natural harmonics by lightly touching the string with the thumb at nodal points. Its name comes from its trumpet like sound due to the unusual construction of the bridge, and the resemblance of its contour to the marine speaking-trumpet of the Middle Ages.

Construction

The body of the marine trumpet is generally either three sides of wood joined in an elongated triangle shape with a pegbox at the apex; or a body of three to six ribs, a frontal soundboard, and a distinguishable neck. In most cases the bottom end of the instrument is open; some historical models use sound-holes. The single string, generally the D string of a cello, most often is tuned to the C three octaves below middle C. It attaches at the soundboard and passes over one foot of the bridge, leaving the other foot to vibrate freely on a plate of ivory or glass set into the soundboard, creating a brassy buzz. From its curiously irregular shape, the bridge was also known as the shoe; it was thick and high at the one side on which rested the string, and low and narrow at the other which was left loose so that it vibrated against the belly with every movement of the bow. A string called a guidon is tied around the playing string below the bridge and runs up to the pegbox where it is wrapped around a peg. The guidon adjusts the balance of the bridge by pulling the playing string.