The bass clarinet is a musical instrument of the clarinet family. Like the more common soprano B♭ clarinet, it is usually pitched in B♭, but it plays notes an octave below the soprano B♭ clarinet. Bass clarinets in other keys, notably C and A, also exist, but are very rare. Bass clarinets regularly perform in orchestras, wind ensembles and concert bands, and occasionally in marching bands, and play an occasional solo role in contemporary music and jazz in particular.