The bassoon is the bass of the double-reed woodwind family, and its double reed is fitted onto a curved metal mouthpiece. It serves most often as the bass in the orchestra, but is also capable of producing witty and comical effects.

It has a wide range that spans over 3 octaves and tone colors that are widely varied and expressive. Its lower notes are dark and solemn, while its middle notes are sweet and humorous, and its upper notes are tender and expressive.