The instrument
The Roland TR-33 is the identical successor of the Ace Tone FR-3 from 1967. What has changed is the design of the model, which can be mounted under an organ.
Details
10 presets: 2 Beat, 4 Beat, Waltz, Slow Rock, Rock'n'Roll, Bossa Nova, Samba, Mambo, Rhumba, Beguine. Variations by rotary switch: Fox Trot 1 / 2, Swing 1 / 2 / 3, March, Haba-Nera, Tango. Rotary switch for volume, balance and tempo.