Slide/glide between two values

Hello.
I'm currently writing a patch, that has a bandpass filter with high resonance, and eight steps with individual filter frequency and time. So when you press a button, the steps are automaticly changing according to the filter freq and time I have specified..

I have all that sorted - so that's good.

I want to be able to have two different values (two different steps) slide from the first one to the last. Of course this value is the filter freq.
Is there a way for me to do this, and if, how? Should I use the curve or line object, and if, how do I set the initial value of the curve or line? I also want to be able to control the time of the glide - that seems to be pretty straightforward with the line or curve though.....

Thanks!!

- Jacob