Drum machine
Drum machine is an electronic musical instrument made to imitate the sound of percussion instruments. Drum machines are commonly used in electronic music genres, but also used in other genres.
Drum Machine Media
Rhythmicon (1932) and Joseph Schillinger, a music educator
Roland TR-808 Rhythm Composer (1980)
Alesis HR-16B (1989) / HR-16 (1987)