A tuba pitched in F or E flat (a fourth above the contrabass tuba). The E flat tuba often plays an octave above the contrabass tuba in brass bands, and the F tuba is commonly used by professional players as a solo instrument and, in America, to play higher parts in the classical repertoire. In the UK and most of Europe, the F tuba is the standard orchestral instrument, supplemented by the CC or BB flat only when the extra weight is desired.