i haven't tried the envelope filter. it seams that duke, you would appear to have a lot of your high and mids gone and the posting seams lifeless. lifeless maybe a harsh word. not your playing but it just seamed darker and quieter maybe not as strong a signal.... I'll try to listen to it on a different output like a stereo system. i really didn't know what the envelope filter did so i looked it up just now.

from the knob position it would be cutting from somewhere around 850-900 hz and up off... thats most of the signal gone. a bass is only in the 40 - 4000 range. but maybe thats the way you planned it. i was using the 6 band eq for a cut off but ill give the Env. Filt. a try.
i noticed Paul's was much higher of a cut off at 75%....i guess maybe that would be around 2600 hz. res at 0% depth at 100%.
(for documentation sake)
(fig. 4.1 from the AT ios phone version manual)
the cuttoff knob "set the cutoff frequency of the filter, from 100 Hz to 3,500 Hz."
the res knobs "sets the resonance of the filter from 0 to 10."
....whatever that means. the resonance of what?
the depth knob "changes the amount of effect that the envelope has on the filter from 0 to 10"