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Wagner Tuba: A five-valved Tuba designed by Richard Wagner, for use in his music.

Waist: A narrowing in the middle of the body of an instrument, resulting in a shape like an hourglass. Typically found in string instruments, and some drums.

Whistle: Any one of a family of wind blown pipes, usually a duct flute. It can be made of clay, plastic, wood cane or metal. Whistles can be simple with a single pitch or, with the aid of finger holes, it may have several pitches.

Whole note/rest: A note/rest equal to two half notes and four quarter notes.

Wind instrument family: Instruments in which sound is produced by the vibration of air, including brass and woodwind instruments.

Woodwind family: Although modern woodwinds are not always made of wood, the woodwinds refer to a variety of instruments operated by an enclosed vibrating air column. It may be by reed or mouthpiece. The Flute, Saxophone, Clarinet, Oboe, and Bassoon are primary representatives.