Power up your pedal holding down both Tape Saturation Bypass and Doubletracker Bypass switches. While continuing to hold down, turn the Lag Time knob. When turning to the left, the Tape Saturation LED indicates Instrument Mode. When turning to the right, the Doubletracker LED indicates Studio Mode. If this method does not change the LED status, then your Deco does not have the latest firmware. Please send an email to [email protected] and we will help you out.