The sousaphone is a type of tuba , Designed so that it fits around the body of the tubist and is supported by the left shoulder, the sousaphone may be readily played while being carried. The sousaphone is a valved brass instrument with the same tube length and musical range as other tubas. It's shape is such that the bell is above the tubist's head and projecting forward. The valves are situated directly in front of the musician slightly above the waist. The bell is normally detachable from the instrument body to facilitate transportation and storage. It is manufactured from sheet brass, usually yellow lacquer, and gold plating options, much like many brass instruments.It is in the key of Bb, and the instrument's part is usually read in "concert pitch",