Add an EX-1 Expression Pedal to your purchase of a Line 6 stompbox Modeler and youll be in control of a dizzying array of possibilities. Every time you save a new and exciting sound, you can actually save two versions of it: one with your heel positioned down on the EX-1, and another sound, further tweaked with any combination of the onboard knobs (except Model Selector), saved with your toe positioned down. Whenever you call up that tone, youll be able to morph effortlessly between the two sounds without taking your hands away from your ax. With the DL4 Delay Modeler, you could morph between short analog delays with no modulation, for instance, to long echoes with vibey chorus. Or perhaps youd like to set the MM4 Filter Modeler to move from a slow, undulating tremolo to a rapid shuddering effect. Why not exploit the EX-1 to create your own custom wah pedal using the FM4 Filter Modelers Q Filter? Whatever your vision, the EX-1 will be there to help you realize it.