Hey Dan,
Thanks for the quick reply. It does play continuously but neuters any ramping (video essentially plays through at 2.5x; the change mitigates the previous effect).
What do you think of interpolation? Would it be possible, in your opinion, to use take Trap Code key frames, to boil up the appropriate key values via an if statement, and then interpolate those frames via an expression?
I am, admittedly, not very familiar with ease(t, value 1, value 2), etc.
Many many thanks.
Michael