I recently got the M9 and an expression pedal, it seems like working the pedal will change the parameters for two effects at the same time. For example using both the tube drive and attack synth effects at the same time- working the pedal changes the frequency and speed parameters for the attack synth at the same it raises and lowers the amount of overdrive from the tube drive, depending on if the pedal is up or down. Is it possible to get the pedal to control only one effect at a time?