View attachment 90000
Here's a sample preset I use with the Synth 9 enabled by default on most scenes. I have each pedal input wired from outputs 3L, 3R, 4L, 4R. If you follow the signal chain starting in the upper left you'll notice I feed Input 1 into Output 3 and Output 4 right after the Pitch Block (used for virtual capo).
The magic to turn the pedals on/off comes from the VolPan blocks after Inputs 3L, 3R, 4L, 4R. Connect the output of each pedal to these inputs. I use 4 VolPan blocks for Inputs 3L, 3R, 4L, 4R, each one set with "Left Only" Input Select or "Right Only" Input Select depending which one I'm trying to target. Also important is the Pan Left and Par Right are set all the way in each direction. Set the Bypass Modes to "Mute" so each of the pedals are turned off independently when you disable the VolPan blocks with your FC-12.
As you can see Outputs 1L, 1R are only for guitar and Outputs 2L, 2R are just the synth tones. Another interesting thing on this preset is that Input 2 is used to feed the audio from my Roland GR-55 for my guitars that have a hex pickup. The signal from the GR-55 also can be turned on/off with the FC-12 by just enabling/disabling the Input 2 block.
One more thing, that Comp Block on the third line is to act as a limiter to prevent too much signal from multiple pedals from clipping the audio.