OVERVIEW Full analog drum machine fully transistorized (TR?) leaving the mechanical disc system and tube technology.
It features 16 preset patterns (including classic rhythm from era like mambo, rock, chacha). Very easy to use: just select a rhythm , set the volume and tempo pots, it is also possible to make combinations out of the rhythms
BUTTON PLAY four buttons to manually play each instrument voice, which included cymbal, claves, cowbell and bass drum. There are some mod to trigger all instruments by +5V.
SYNC There is not external Sync clock, just internal frequency clock
HAMMOND The fr1 has been also implemented on the hammond organ with preset patterns