The valve trombone is a musical instrument that is popular among jazz musicians and enthusiasts alike. It is a variation of the traditional slide trombone, but instead of a slide, it uses valves to produce sound. There are a few synonyms for the valve trombone, including a piston trombone or a rotary valve trombone. The piston trombone is a variation that uses a piston valve system similar to a trumpet, whereas the rotary valve trombone uses a rotating valve to produce sound. Regardless of the type, a valve trombone produces a unique sound and is a great addition to any brass ensemble.