Kazoo’s voice is similar to the saxophone, it’s the good companion for guitar, ukulele, violin, piano and many other musical instruments. How Kazoos Work? The kazoo is a musical instrument that adds a "buzzing" quality to a player's voice when the player vocalizes into it. It is a type of mirliton, which is a membranophone, one of a class of instruments which modifies its player's voice by way of a vibrating membrane. It is a unique musical instrument that is extremely easy to play making it the ideal outdoor companion for all ages -- on the trail, around the campfire, camping, hiking, backpacking, boy scouts, traveling, or... that hipster friend who is super into making music but can't really play an instrument.