image courtesy of Hyperreal
The CR-68 is a slimmed down CR-78. Like the CR-78, it features 34 different preset rhythms (17 buttons, plus a toggle switch choosing from bank A and B). However, it does not allow you to program your own patterns. There is a knob to select between 5 "variations", as well as controls for volume, tempo (with an LED that flashes the tempo), balance and accent. The pattern is started and stopped by a single dual-function button.
Presets are Rock 1 A/B, Rock 2 A/B, Rock 3 A/B, Rock 4 A/B, Disco 1 A/B, Disco 2 A/B, Waltz A/B, Shuffle A/B, Slow Rock A/B, Swing A/B, Fox Trot, and Tango, Boogie A/B, Enka A/B (Enka is a style of Japanese music), Bossanova, Samba, Mambo, Chacha, Beguine, Rhumba.
Rhythms are combinations of the following available voices/sounds: Bass Drum, Snare Drum, Rim Shot, Hi-hat, Cymbal, Maracas, Claves, Cow Bell, High Bongo, Low Bongo, and Low Conga ----[from a CR-68 ad courtesy of the archives at Hyperreal.