Aulos 533B bass recorderIntroducing the Aulos 533B bass recorder This "Symphony" bass recorder has been designed primarily for ensemble playing. It is pitched in the key of F and its range is from f (below middle C) to g'' (two octaves above). The sound is rich and full throughout the reigster. The 533B has been specially tailored to be as ergonomically efficient as possible. It has a metal crook so that the keys can be reached more easily, as well as double keys for the F