Drum refers to the steel drum containers from which the pans are made; the steel drum is more correctly called a steel pan or pan as it falls into the idiophone family of instruments, and so is not a drum (which is a membranophone). Steelpans are the only instruments made to play in the Pythagorean musical cycle of fourths and fifths.

 
Drum refers to the steel drum containers from which the pans are made; the steel drum is more correctly called a steel pan or pan as it falls into the idiophone family of instruments, and so is not a drum (which is a membranophone). Steelpans are the only instruments made to play in the Pythagorean musical cycle of fourths and fifths.