Hi everyone. As the title indicates I'm having some issues with my Soul Food Overdrive. When connnected to my pedal board regardless of where it is in the chain I'm getting a high pitched "whining" noise when I plug the pedal into a power source. When activated the pedal's tone and gain knob seem to function but the volume knob doesn't do anything. It can be fully off and the volume is still 100% on. Has anyone else had a similar issue or is my pedal just a dud? Thanks!