The controls on the Haunting Mids are Volume, Mids, Sweep, and a Lo/Hi toggle. The Volume acts as a standard volume control to be able to set at unison or boost the signal. The Mids and Sweep controls work very closely together, so you can find the perfect frequencies to boost or scoop mid frequencies. When the Mids knob is at 12 o'clock, no frequencies are boosted or scooped. Turning the Mids knob to the left of 12 o'clock will begin to scoop out midrange frequencies, while turning the Mids knob to the right of 12 o'clock will begin to boost midrange frequencies.

The Sweep knob controls which frequencies will be affected. Sweep knob to the left will cause low-mids to be affected, while Sweep knob to the right will cause hi-mids to be affected. The Lo/Hi toggle is like a "Q" function and controls how sharp the frequency peak is that you’re affecting with the Mids knob. "Lo" is a softer and wider peak for a slightly subtler effect as you tweak the Mids/Sweep knobs. "Hi" is a sharper and steeper peak, giving you a very pointed and defined effect as you tweak the Mids/Sweep knobs.

This pedal is fantastic on an almost-breaking-up amp to send it into midrange tube-driven heaven, or with an overly scooped distortion to give you the bite you need to cut through with every "djent," blues lick, rock riff, or lead line. It's also excellent for taming an overly mid-heavy amp or pedal rig. The Haunting Mids is not an overdrive pedal; it’s a Mids pedal that, when paired with an overdrive, will make you scream for more of this friendly ghost.