 In concert bands, clarinets are an important part of the instrumentation. The E ♭ clarinet, B ♭ clarinet, alto clarinet, bass clarinet, and contra-alto / contrabass clarinet are commonly used in concert bands. Concert bands generally have multiple B ♭ clarinets; there are commonly 3 B ♭ clarinet parts with 2 – 3 players per part. There is generally only one player per part on the other clarinets. There are not always E ♭ clarinet, alto clarinet, and contra-alto clarinets / contrabass clarinet parts in concert band music, but all three are quite common.
