The lowest pitched and largest brass instrument known is the tuba. The tuba is one of the newest members of the modern symphony orchestra. It was first publicly played in the middle of the 19th century when it took the place of the ophicleide. The player produces sound by vibrating his lips against a large cup-shaped mouthpiece.
The banjo has a body similar to a tambourine with four or five strings. The strings cross above a pressure bridge and are attached to a tailpiece. These vibrate and also cause the stretched animal hide or plastic membrane to vibrate.
The clavichord is the most subtle and simplest among stringed keyboard instruments. It was popular in the Medieval, Baroque, Classical, and Renaissance eras. The clavichord flourished from the 1400ís to the 1800ís. It is rectangular with generally decorated and painted lid and casing. Its strings are stretched laterally from the tuning pins up to the hitch pins where there are dampers in the form of felt strips across the strings.