In the words of EarthQuaker Devices:

EarthQuaker Devices have been huge fans of the spirit of subculture that Brain Dead celebrates through its graphics-led approach to clothing, gear and accessories, and we were honored to offer up the Ghost Echo as the latest canvas for their mind altering creative vision.

Controls:

• Attack: Adjusts the length of the pre-delay, from 30ms at minimum to about 150ms at maximum. When the Dwell is set to self-oscillate, this will change the pitch of the oscillations.
• Dwell: Adjusts the length of the decay. This will start to self-oscillate around 3 Oclock, the pitch of the oscillations can be changed by turning the Attack control.
• Depth: Mixes in the wet signal with the dry, unity is around noon and everything after is boosted.