Changing speed of [line] ramp in real time.

Hi all,

I'm trying to create a ramp using the [line] object with which I can adjust the speed to change the rate of number flow in real time.

For example, here is my current patch:

My problem with this however, is that the patch doesn't take the new speed value until the ramp is finished. I want to be able to change the speed at any point during the list.

Thanks for any help.