Guitar Overdrive Styler

A friend of mine built a versatile guitar pedal to be used for styling the sound of overdrive pedals and/or tube amplifiers. It can also be used as a booster or an equalizer.

Below is a short video about it. The first part is an introduction which shows differences in frequency responses when boosting certain frequency ranges and harmonics. The part about the OD Styler starts at 9:06.