If you are using a non-Roland pedal with the RD-300NX, it may be necessary to change the polarity (if the pedal appears to be working backwards, for instance). Here is the procedure:
1. Press MENU.
2. Cursor to "0.System" and press ENTER.
3. Cursor to "Damper Polarity," "FC1 Polarity," or "FC2 Polarity" and select the desired setting (the options are Standard or Reverse). The Standard setting should be used with Roland pedals.