Switching Series/Parallel Effects

So, I was thinking that it would be interesting to model a “double” pedal similar to the King of Tone or JHS Double Barrel. As I was thinking it through, I thought about switching between series and parallel paths through the two “sides”. I came up with a solution using a pair of switchboxes (2-to-1 and 1-to-2). This worked just fine, but I had to manually switch both switchboxes using the endless knobs. There was also the issue of compensating the gain when switching topology. I thought I recalled the ability to assign controls to CV, so I did some research and found that enumerated controls (the switchboxes use named values e.g. “Channel 1” instead of a toggle state) can’t be assigned to a CV port.

After some more futzing about, I recalled that there is an on/off switch on the switchboxes that doesn’t appear in the pedalboard view, but appears in the configuration view for the switchbox. It wasn’t clear what that did, so I set up a test.

Here’s what I found for the 1-to-2 and 2-to-1 switches.

Basically, the 2-to-1 set to the lower input acts as a flip-flop with the power switch. No such luck for 1-to-2

With that in mind, I just needed to add an additional 2-to-1 switch and now I can switch between the 2 effects in parallel or in series, with gain compensation on the parallel path, using a single Control to CV plugin set to a foot switch.

Why would you want to do this? I have no idea. I’m not even sure it’s useful or if I’ve done this in the most effective way. But it works, and it was a lot of fun learning how some of these utility plugins work.

Check out my pedalboard!


Thanks.Great stuff. I‘ll will use it to switch reverb and delay effects from serial to parallel.

I think a series/parallel switch could be a nice addition to the plugin list.


I’m thinking about modding the existing plugins to remove the channel switcher and become a simple A/B box controlled by the foot switch.

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