16Firmware UpdateUnplug all inputs/outputs from the module. Connectthe output of your audio interface or sound card tothe IN input jack. Set the FREQ knob to 12 o’clock.Power on your modular system while holding the POLYbutton, then release. Both LEDs should blink amber.When you are all set, play the firmware update file intothe module. While the module receives data, the POLYLED will blink green, and the MODE LED will monitorthe signal level. Signal reception is optimal when theMODE LED is green or yellow. Try adjusting the FREQknob to change gain. The module will periodicallypause to write data to its permanent memory. BothLEDs will be amber during these pauses. When theend of the audio file is reached, the module willautomatically restart. If it doesn’t restart, please retrythe procedure.If the signal level is too weak, the LEDs will blink redin an alternating pattern. Press the POLY button andretry with a higher gain. If this doesn’t help, try theprocedure from a different computer or audio interface,and make sure that no other equipment (such as anequalizer or FX processor) is inserted in the signalchain.