The Phrase Loop Light flashes as an indicator of the current tempo settings. You can turn that feature off by using the following procedure:
1. Press MENU.
2. Turn the Function 1 knob to select SYSTEM (under the SETTINGS options).
3. Press Function 3[ENTER].
4. Use the Function 1 knob to select Tempo Indicator.
5. Use the Function 3 knob to select OFF.