The contrabass clarinet and contra-alto clarinet are the two largest members of the clarinet family that are in common usage. Modern contrabass clarinets are pitched in B, sounding two octaves lower than the common B soprano clarinet and one octave lower than the B bass clarinet. Some contrabass clarinet models have a range extending down to low (written) E, while others can play down to low D or further to low C. This range, C(3) – E(6), sounds B(0) – D(4). Some early instruments were pitched in C; Arnold Schoenberg's "Fünf Orchesterstücke" specifies a contrabass clarinet in A, but there is no evidence of such an instrument ever having existed.