Notation in the tenor and bass clefs, no transposition. All three trombone parts are usually written in tenor clef for the upper register and in bass clef for the lower.
Although the tenor trombone is tuned to Bb1, music written for it does not take this into account: the sound is as written. The instruments in the trombone family are tuned to different pitches – the alto trombone is in Eb2, the bass trombone in F1, the contrabass trombone in Bb0. This means that the musician must use a different fingering whenever he changes instruments. The tenor-bass trombone’s fingering is particularly challenging, because the fundamental pitch can be altered from Bb1 to F1 by means of a fourth-valve (or to Eb1 by means of a fifth-valve).