I'm plugging the bass into the pedal (battery power) which goes into a DI box which goes into my interface, which goes into my PC via some noise reduction gizmo, I haven't tried it with a power supply yet so that's my next step.
I think ped is right in saying it's probably just a noisy pedal because every other one I've tried is fine on battery power.
Hopefully a power supply sorts it but if not I'll have to buy myself a Sansamp or something, what a shame 😁