The Carl Martin Paraloop helps to bridge the gap between digital effects and analog signals.  When using digital multi-effects through amplifiers with only serial fx-loops, using the Paraloop will allow you to adjust the amount of digital fx signal or the amount of analog signal you prefer (with the Wet/Dry Control Knob), or with a Bypass switch to take the entire digital effects unit out of the loop.  Allowing a certain percentage of analog signal to remain under your digitally affected signal, creates a fuller, richer tone….just ask Carl!