Description
In 1980, Roland introduced their first simple and affordable drum machine to bear the BOSS Dr. Rhythm brand (the DR-55) offering four sounds, an Accent and a limited number of programmable patterns.
It was followed by the Dr. Rhythm Graphic (DR-110) in 1983, which offers a wider selection of sounds, preset patterns, an increased number of programmable patterns and the ability to chain patterns together to form songs.
The simple step programming of the first Dr. Rhythm, with alternating button presses for notes and rests, is augmented by an LCD with a grid showing the individual notes in the current pattern. In addition to step programming there is also a “tap write” programming mode, albeit without a metronome click for timekeeping.
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