The contrabass tuba is a contrabass instrument. One of its principal tasks is the doubling of other bass instruments, usually an octave lower. Especially in tutti passages its role is to provide a firm fundamental bass. Pedal tones are only possible piano and are seldom used.
In especially large brass sections, for example with six or eight horns, two tubas are used, either two bass tubas or a bass and a contrabass tuba.
Contrabass tuba + brass instruments
Contrabass tuba + tuba
Played in unison the effect produced by a contrabass tuba with its bass counterpart is not particularly interesting. Played in octaves the sound combination is homogeneous and pleasing, although it can be “dangerous” to do this forte because it smothers instruments in the middle register. A good blend is achieved with the Wagner tubas.
Contrabass tuba + trumpet, horn
Reverberant chord combinations can be produced together with the trumpets, horns and trombones.
Contrabass tuba + trombone
The contrabass tuba often provides the bass to the trombone section, either on its own or an octave below the bass trombone or in unison with the contrabass trombone. The contrabass tuba and contrabass trombone are similar in volume, although their timbre differs greatly.
Contrabass tuba + woodwinds
Contrabass tuba + bassoon, contrabassoon
Doubling, also in octaves, of the bass voice (bassoon and contrabassoon).
Contrabass tuba + strings
Contrabass tuba + double bass
Very good blend with the double-bass. The contrabass tuba’s staccato can be compared to the pizzicato of the double-bass.