Does the S.B.G. work safely with ALL effects pedals?
The reason the module has two gain controls (the black thumb knobs) is to accommodate the many different pedal designs that are out there.
To be safe, start with low levels when connecting S.B.G. to your pedal(s). It is extremely unlikely you will damage anything even with high levels; if the gain is set too high you may just hear unwanted distortion.
The bottom section of the S.B.G. limits CV signals to a maximum of +3 or +5 volts as to be safely patched into a pedal’s expression input. You should also use the included ‘floating ring cable’ which comes with the S.B.G.
If you are unsure which maximum voltage your pedal expects then check with the manufacturer, but you should always be safe using the 3V output.