Originally Posted by: 69deville

Hey all, what exactly is a expression pedal and how does it work? Is it the same as a volume pedal? Thanks in advance. Dale

Expression pedals can be used to control how much (from 0-100%) an effect has on your sound. It typically allows you to alter some specific parameter (how much modulation, delay, gain, etc.) on the fly. But the effects pedal or unit has to have the built in ability to have an expression pedal built in.

For example, think of a volume pedal but that controls not the volume, but the amount of an effect.

Short demo: https://www.youtube.com/watch?v=wXIwaiiDeHc

Long demo: https://www.youtube.com/watch?v=k92L8ddw_Ws

Hope that helps!