The octavin is a woodwind instrument with a conical bore and a single reed. As such it resembles a saxophone, and its range is similar to that of a soprano saxophone, but the octavin differs in three respects: first, its conical bore has a smaller taper than that of a saxophone; second, its body is made of wood, rather than metal; third, its usual shape is similar to that of a bassoon, having two parallel straight sections joined at the bottom, with the mouthpiece attached to the top of one section and a metal bell to the top of the other.