:( :( :(
I tried with the pitch glide, just getting something "similar" and it requires some practice with the pedal.
Maybe I'll have inevitably to add an analog wah on my FX chain....
Just to talk about theory ;), since wah is a linear electronic circuit,
http://www.electrosmash.com/vox-v847-analysis
it does have a linear transfer function (i.e. a linear model).
By Inverting input and ouput shouldn't a new transfer function result which is the inverse of the original?
Obviously, it should have a dedicated model.