The Zoom RT-223 is a battery operated, lightweight portable Rhythm and Bass drum machine. It is designed for live performance DJ pattern generation and arrangement, personal song creation and composition, or studio use as a sound layering solution. The RT-223 features a large library of sounds and patterns and several functions that quicken and enhance the arrangement and performance process. The touch-sensitive trigger pads are backlit, facilitating its use in dark stage and studio environments. It is an inexpensive and feature-laden programming tool for DJ's and musicians.