[1] It features both a set of three piston valves and a slide to vary the pitch.
The only known built instrument now resides at the Institute of Jazz Studies at Rutgers University.
[4] The last noted player of the valide trombone was Juan Tizol of the Duke Ellington and Harry James Orchestras.
The similar superbone, as developed by Larry Ramirez of Holton Musical Instruments in the 1970s (its leading exponents were Maynard Ferguson and Ashley Alexander), has a full-length slide with seven positions, placed between the mouthpiece and the valves.
[5] This article relating to brass instruments is a stub.