Help me Pork Barrel-ify my Lithium…

[pricklyrobot]

Several years ago I built the “deluxe” version of the Madbean Pork Barrel (the one on the left). I’ve got an Aion Lithium board to build and I thought it would be fun to try and match the design and the mods (art on the right).

The circuits look pretty similar to each other. And I’ve drawn out what I think the changes I need to make are, just wanted to see if some more knowledgeable folks care to take a look and confirm or correct. I guess it’s a preemptive troubleshooting thread


So, for “Vibrato” I have this:



For “Bass” I think I toggle another cap in parallel with C13? But what would be a good value? From what I’ve read elsewhere the idea is to actually cut bass in the effected signal, in order to emphasize it in the dry blend? :



For “Mod” I think I’m just bringing the Lithium’s internal “Vintage/Modern” switch out to a toggle, and figured, may as well add a third value while I’m at it:



Here’s the Pork Barrel schematic:

And the Lithium:



Thanks in advance for any knowledge y’all might care to drop!

 

[pricklyrobot]

On the Lithium, is C13 making a high-pass filter with R22?

If so it would put the cutoff frequency there at 15Hz.

Looking at the same area (Bass aka “Wet” toggle) on the Pork Barrel you’d be toggling between 482Hz and 1326Hz.

So if I put a .012uF in C13 and then a 1uF switched in parallel, I’d have 1326Hz or 15.7Hz (pretty much “stock”) in that spot?

Or am I totally misunderstanding what’s going on here…