The disclosed volume-adjustment circuit sets the volume of each pickup setting in a topology-setting switch independent of other pickup topology settings in the switch. The volume-adjustment circuit has three parts: (1) a pickup topology selection switch that selects separate pickup-topologies, (2) separate and independent signal paths for chosen pickup-topologies, and (3) separate volume adjustment circuits in electrically separate and independent signal paths. Thus, the disclosure provides separate volume adjustment for selected pickup topologies of the pickup topology selection switch.