brakes, the circular hub the brake shoes press against), or a fifty-five gallon oil barrel musical instruments yet composers and percussionists use these objects. Percussion instruments generally fall into the following categories: Conventional or popular Drum kit Gong (tamtam) Tambourine Triangle Unconventional Automobile brake drum Beer kegs Brooms Clay pots Firearms or explosive charges Five gallon buckets Garbage cans Glass bottles Hammer Metal pipes Metal pots Plastic bottles Plastic bag Rocks in a bucket Shopping carts Spokes on a bicycle wheel Tableware One pre-20th century example of found percussion is the use of cannon usually loaded with blank charges in Tchaikovsky's 1812 Overture. John Cage, Harry Partch, Edgard Varèse, and Peter Schickele, all noted composers, created entire pieces of music using unconventional instruments. Beginning in the early 20th century perhaps with Ionisation by Edgard Varèse which used air-raid sirens among other things, composers began to require that percussionists invent or find objects to produce desired sounds and textures. Another example the use of a hammer and saw in Penderecki's De Natura Sonoris No. 2. By the late 20th century, such instruments were common in modern percussion ensemble music and popular productions, such as the off-Broadway show, Stomp. Rock band Aerosmith used a number of unconventional instruments in their song Sweet Emotion, including shotguns, brooms, and a sugar bag. The metal band Slipknot is well known for playing unusual percussion items, having two percussionists in the band. Along with deep sounding drums, their sound includes hitting baseball bats and other objects on beer kegs to create a distinctive sound. By cultural significance or tradition It is not uncommon to discuss percussion instruments in relation to their cultural origin. This led to a division between instruments considered common or modern, and folk instruments with significant history or purpose within a geographic region or culture. Folk percussion instruments Berimbau Bodhrán Bombo legüero Bongo drum Cajon Conga Dhaa Dhime Dhol Dholak Djembe Dunun Gamelan Ghatam Kalimba (Thumb Piano) Kpanlogo Lagerphone Latin percussion Madal Marimba Marimbula Naykheen Pogo cello Skrabalai Spoons Steelpan Tabla Taiko Tambourine Thavil Timbales Tonbak Urumee Udukai "Common" drums This category includes instruments that are widely available and popular throughout the world: Drum kit, typically consisting of: Bass drum Crash cymbal Ride cymbal Floor tom Hi-Hat cymbals Snare drum Tom-tom drums Marching percussion instruments Orchestral percussion instruments By capability of melodic production Non-melodic percussion: bongos, snare drum, etc. Melodic percussion: glass marimba,