A master key Bb and 9 feet in length, as well as Tenor Trombone but a bigger pipe to sound heavier and more tender. Often diameter pipe (Bore Size) bigger Tenor Trombone as 0.562 "or 0.580" and a horn (Bell) from 9 to 10½ inches, generally with Valve for turning the keys to the F and for some machines may have. Valve itself, which can change the sound down to just a couple 3 Minor or 3 Major (depending on model) makes it possible to mix a variety of such Bb / F / Gb / D, Bb / F / G / Eb, Bb / F /. D and Bb / F / Eb
bass trombone, a modern version of the Tenor bass Trombone which is extended air duct and a blunderbuss to a larger later on in the past, bass Trombone keys FG and Eb, but declining reputation after. Tenor Bass Trombone invention, which can cover the gamut from former trombone While it would take them all.
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