Finished up the Big Muff Pi 6-in-1 bonus PCB and want to add a clean blend knob to it with the Buff n Blend board. I’ve got everything wired up, but I think I’m experiencing the phase inverting issue mentioned in the docs, as something sounds a little “off”. The docs mention either adding the board to another like a combo, or using the Stage 3 PCB, but I dont have plans to make this one a combo, nor do I have the Stage 3 board (it isnt in stock either).

Based on some light research it looks like I may need to add another transistor somewhere to invert the phase again? I’m comfortable with additional offboard wiring stuff, but Id also like to not add any other “features” like an additional boost or something to this pedal because I’ve already got a couple toggles in mind and dont want to overcrowd. I’m still learning though so bear with me please.

Anyone have any other suggestions for this?

One other thing is that it kind of sounds like im also experiencing the opposite of what the docs mention R5 is for; I can hear the clean signal even when blend is all the way wet. If I turn blend all the way to wet, but turn down the effect volume, I can hear the clean pretty clearly. Is this what is supposed to happen?

Thanks