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
Helicon (instrument) military marching bands. The German manufacturer Melton developed these instruments using the acoustical proportions of the "Červený Imperial BB Contrabass Helicon": Helicon (instrument) The helicon is a brass musical instrument in the tuba family. Most are B basses, but they also commonly exist in E, F, and tenor sizes, as well as other types to a lesser extent. The sousaphone is a specialized version of the helicon. The first sousaphone, a non-production prototype made by J. W. Pepper & Son, Inc., had an upright bell, hence the nickname "rain catcher" because of its shape. Later production versions differ primarily in