The soprano saxophone is a variety of the saxophone, a woodwind instrument, invented in 1840. The soprano is the third smallest member of the saxophone family, which consists (from smallest to largest) of the soprillo, sopranino, soprano, alto, tenor, baritone, bass, contrabass and tubax. In 2001, François Louis created the aulochrome, a new woodwind instrument that is made of two soprano saxophones joined together, which can be played either in unison or in harmony.[citation needed]