Rototoms are drums which have no shell at all, just a single head and a die cast zinc or aluminum frame. Unlike other toms such as Tom-tom drums, rototoms have a definite pitch and some composers write for them as a tuned instrument, demanding specific notes. They can be tuned quickly by rotating the head. Since the head rotates on a thread, this raises or lowers the head relative to the rim of the drum and so increases or decreases the tension in the head. Invented by Remo drums company. Rototoms are sometimes used in drum kits. Jump to: navigation, search A tom-tom (not to be confused with a tamtam) is a cylindrical drum with no snare. ... Jump to: navigation, search In music, pitch is the perception of the frequency of a note. ... Jump to: navigation, search A drum kit (or drum set or trap set - the latter an old-fashioned term) is a collection of drums, cymbals and other percussion instruments arranged for convenient playing by a sole percussionist (drummer), usually for jazz, rock, or other types of contemporary music. ...