Boss DR-3

The Boss DR-3 is a drum machine and rhythm composer made by the Roland Corporation. It is a compact, affordable, and easy-to-use device that allows users to create and play back drum patterns. It has been used by a variety of artists, including Nine Inch Nails, The Prodigy, and The Chemical Brothers.

The DR-3 has a variety of features, including a built-in library of drum sounds, a step sequencer for creating patterns, and a variety of effects. It also has a built-in metronome and a tempo control for adjusting the speed of the patterns. Additionally, it has a built-in mixer for adjusting the levels of each drum sound. Finally, it has a USB port for connecting to a computer and transferring patterns to and from the device.