Parallel Blend

I'd love to see a mini board, to add to any pedal pcb, that allows for a "parallel" blend of the unaffected/effects signal. Midpoint of pot would be 50/50 mix (full signal of both) and then turning the knob in either direction would blend "out" the other signal.



Active member
Also this would be great because our rhythm guitarist has been bugging me to make him a 808/Quantum Mystic parallel pedal for months. Honestly the only thing holding me back is the Quantum Mystic was a weird build with lots of issues that I remedied and don't remember.


New member
The madbox splitter does exactly what you want.
I used it to build a parallel rat/green Russian muff clone.
Works like a charm and sounds awesome.


Count me in!
Glad this popped up again -- didn't think to search for "blend" as an alternative to "mix", as I nearly posted the same wish yesterday.
I'm assuming the flexibility afforded by phase inversion and the goal to minimize board size are likely at odds with each other.
If this means SMD is the way to go, I'm still in. Either way, +1 on phase inversion.

Curious to know if the board could be designed so that a 3rd channel could be populated or that section removed if not desired?
I'm naively imagining that the unwanted section of PCB could be snapped off, much like the 3PDT footswitch PCBs are made, for example.


Active member
That's almost exactly the circuit I have worked up, but the board would be bigger than I'd like for this purpose.... (without using SMD components)
What about making it so the ICs mount on the back of the board, and specifying MLCC for the caps in the signal path? Visualizing it mentally, that'd make it around half as big as the Paralyzer


Active member
If sticking with dual opamps (or a quad), you could use the last one to throw another inverting path in at Return 2 with a dpdt to correct phase issues