I Hear a Weird Noise, What Can I Do?

Most often, noise issues are related to the power supply feeding the Eternity. The first thing to check, does the power supply meet the requirements to power the Eternity (9V DC 300mA). Supplying voltage above 9 volts can damage the Eternity and supplying 9V with not enough current will cause unpredictable behavior and noise issues.

Is the Eternity being supplied with its own isolated power port (no daisy chaining). Daisy chaining power from pedal to pedal can introduce unwanted noise.