Setup the patch: Noise to Filter signal input, then Filter output to Outs 1&2. Turn Filter Frequency up all the way, to pass all frequencies.
Now, turn the Filter Level knob up and down. It should make the audio output of the Filter increase and decrease, right? But, it has no effect.
Thanks for checking on this.
PS: I tried searching to see if this had been covered already but searching for "filter level" only produced this message from the board:
The following words in your search query were ignored because they are too common words: filter level.
So I did this Google search instead: http://www.google.com/search?q="filter+level"+site%3Axils-lab.com, but still didn't find anything about this issue.