From the factory, the time signature of the rhythm guide in the RC-3 is set to 4/4. To change the rhythm guide to 3/4, follow these steps:

1. Press and hold the RHYTHM ON/OFF button for at least two seconds until the rhythm number flashes in the display.

2. Press and hold RHYTHM ON/OFF again for two seconds until "b4" appears in the display.

3. Press the down arrow button to select "b3."

4. Press RHYTHM ON/OFF once to save the new setting and return to Play mode.