Kazoo - The Kazoo is a musical instrument that adds a buzzing timbral quality to a player's voice when the player vocalizes into it. It is a type of mirliton (itself a membranophone), one of a class of instruments that modify the player's voice by way of a vibrating membrane of goldbeater's skin or material with similar characteristics. A kazoo player hums, rather than blows, into the wider and flattened side of the instrument. The oscillating air pressure of the hum makes the kazoo's membrane vibrate. The resulting sound varies in pitch and loudness with the player's humming. Players can produce different sounds by singing specific syllables such as doo, too, who, or vrrrr into the kazoo.
Keyboard - A Keyboard instrument is a musical instrument played using a keyboard, a row of levers which are pressed by the fingers. The most common of these are the Piano, Organ, and various Electronic Keyboards, including Synthesizers and Digital Pianos. Other keyboard instruments include Celestas, which are struck idiophones operated by a keyboard, and carillons, which are usually housed in bell towers or belfries of churches or municipal buildings.
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