The DD-500 can be configured to work in either Buffered or True Bypass Mode.
To access this functionality:
1. Press EDIT.
2. Use the UP/DOWN ARROW buttons to select: SYSTEM.
3. Press EDIT.
4. Use the UP/DOWN ARROW buttons to select: BYPASS.
5. Turn the TIME/VALUE knob to select either: BUFFERED or TRUE (True Bypass).