Like the pedal I would use to get that fat sound in Impulse? Or is the octave thing in the Digitech something else?
The very first setting under the 'Harmony' presets is an Octave Up, Octave Down function. With the pedal in the hell position, you'll hear your note mixed with the same note an octave below. With the pedal in toe position, you'll hear your note mixed with the same note an octave above. You can also sweep it between the octave below and octave above intervals.
Sweet. Now I definitely want one.