RC-30: Changing the Time Signature
From the factory, the time signature of the rhythm guide in the RC-30 is set to 4/4. To change the rhythm guide to 3/4, follow these steps.
1. Press and hold the RHYTHM TYPE button for at least two seconds until "b4" flashes in the display.
2. Press the down arrow button to select "b3."
3. Press RHYTHM TYPE once to save the new setting and return to Play mode.