Trombone so the name means "large trumpet". The trombone has a predominantly cylindrical bore like its valved counterpart the baritone and in contrast to its conical valved counterparts, the cornet, the euphonium, and the French horn. The most frequently encountered trombones are the tenor trombone and bass trombone. The most common variant, the tenor, is a non-transposing instrument pitched in B, an octave below the B trumpet and an octave above the pedal B tuba. The once common E alto trombone became less widely used as improvements in technique extended the upper range of the tenor, but it is now enjoying
Tenor horn whole-bore brass instrument, most players can play some pedal tones, the fundamentals (first partials) of (at least) the shorter tubing lengths. Tenor horn parts are written in the treble clef. The tenor horn is an E transposing instrument written a major sixth above concert pitch: the tenor horn notation for middle C represents the E below middle C in concert pitch (E in scientific pitch notation). The instrument known today as the tenor/alto horn was developed in the 1840s by the Belgian instrument maker Adolphe Sax who, among other instrument design activities, designed two similar families of valved brass instruments,