Isaac, first off thank you for the kind words!
Next, never apologize for asking questions. That’s how we all learn around here. 🙂
The reason I didn’t install the C8 cap, to put it simply is, that I overlooked it! (Palm plant to forehead)
Now that I think about it, I only had two 560p caps at the time and had to order them. I put the build aside and was working on a couple of other projects at the time. I finished the projects a week or so later, boxed up the Muff’n guts, forgetting it needed the C8, and the rest, as they say, is history. Thanks for pointing that out! I will install that tomorrow and see if my old ears can tell any tonal difference. By the way, this pedal really rocks!
Your question peeked my curiosity and I went web surfing to see exactly what that cap did.
There is a great article at http://www.kitrae.net/music/big_muff_guts.html that goes into great detail as to how the different circuits work in the Big Muff. In the “Feedback / Filter Caps” section on that page It explains exactly what that cap (actually the C2, C5, and C8 all 560p’s) do. So thank you for that as well.
Cheers!
-=SteveO