The contrabassoon is a large woodwind instrument that plays an octave lower than the bassoon. It is made of wood or plastic and has a long, coiled tube that helps produce deep, resonant sounds. The instrument is played using a double reed, similar to the bassoon, and is often used in orchestras to add depth to the music. Typically, the contrabassoon is used in classical music, particularly in orchestral and chamber settings. It can be found in works by composers like Richard Wagner and Gustav Mahler, where its unique timbre enhances the overall sound. The contrabassoon is less common than other woodwinds but plays a vital role in creating rich harmonies.