instead automate the mix of the filter output to the input signal, pretty sure you can do that on a couple of the reason synths.
nah you cant do that, you can only automate the bypass, freq, res, velocity, envelope ammount and then envelope.
nah the bypass is the swith at the top left of every effect/synthisn't bypass the right parameter? which synth are you using and ill have a look on my copy.