So I just finished this up, and it seems like it partially works. Everything seems to work fine when it is in the UP mode (I think, whichever is the opposite wah sound) but when I switch to the DOWN I get dry signal plus a bit of noise in the background which sounds like the filter working. Any idea what particular area I should look with such a problem?
did you double check all your part values? I would start there...
You might have to adjust ... multiple ... knobs to get it to work between mode. Particularly the gain, but you'll also have to turn the sweep down.
What's your indicator LED doing in each mode?
Some of that noise is normal I think. At least, that's what I experience too and I believe mine is functioning properly. Is it a really thin almost washy type of sound?
Like midwayfair said, you do have to adjust multiple knobs between the 2 different sweep directions to get the most out of it.