in / out module for raising / lowering audio levels for eurorack and FX pedal interaction optimization

c1t1zen designed and built module
allows audio to get into sweet spots of eurorack or fx-pedal levels with the quickness of turning a knob
one knob for a pair of in / out jacks to raise audio levels
one knob for a pair of in / out jacks to lower audio levels
useful to interface eurorack with other hardware / outboard gear and vice versa