The message "KNOB IS LOCKED" appears when the KNOB LOCK function has been activated. This prevents settings from being changed inadvertently on stage or in other such situations, during performance.
Use the following procedure to turn off or deactivate KNOB LOCK:
- Press the [MENU] button.
- Use the [1] knob to choose "PLAY (PLAY OPTION)", and press the [ENTER] button.
- Use the [3] knob to set KNOB LOCK to OFF.