Jon Johnson 208 Report post Posted April 10, 2017 After their prototype the rhythm Ace R-1 was shown at the 1964 NAMM shw, Ace Tne released the Rhythm Ace FR-1. The first drum machine produced by circuit they called a diode matrix. It showed rows of pulses that would show the position of each instrument in the machine. It has 16 preset patterns and 4 buttons to manually play each instrument like cymbal, claves, cowbell and bass drum. If the user pressed multiple buttons together it can play over 100 possible rhythm combinations. The Hammond Organ Company also sold the FR-1 presets into their organ models of the era. View full drum machine Share this post Link to post Share on other sites
