By the way, Robert, be careful of what some makers call an "active" pedal. Properly speaking, an active pedal means it is powered. However, Ernie Ball plays fast and loose with the terminology. They have a pedal that they call an "active" pedal, but it isn't. It simply has a 25 k ohm pot instead of a 250 k ohm pot. But the pedal, itself, is still passive. I also have the 25 k ohm Ernie Ball pedal, but I use it for an expression pedal with my Line 6 X3 Live. In this situation it is used in an active, control circuit. It doesn't actually have the audio signal passing through it. For this purpose, it works very nicely.
But, you need to look at the specs of the pedal. Even a powered pedal can have poor specs. Two of the key things to look at are the input and output impedances of the pedal.
Thanks! No wonder I never used one before!!!