"Clarinet Fingering Charts [has a] list of all available fingering charts for Boehm-, Albert-, and Oehler-system clarinets and Kinderklarinettes. The Boehm-system clarinet is widely used in bands and orchestras, although the Oehler- and Albert-system clarinets are commonly used in some regions, such as central Europe. The fingerings generally apply to all sizes (soprano, alto, bass, and contrabass) of clarinets unless specified otherwise. Each fingering chart is split up by registers, whose ranges are notated and clickable. Trills are arranged in order by the lower, principal note."