Animation Blending: How to blend smoothly to start frame of second animation?

Hi There,

I’m trying to figure out how to set up blending which differs from the default behaviour. From what I can see, by default when blending to another animation the current and next animation will both “play” in parallel and the resulting bone locations are calculated as a combination of the locations in the two anims. What I want is to maintain blending but ensure that the animation reaches perfectly the starting frame of the second animation and then plays it. Maybe a little diagram would help:

Any ideas would be appreciated.

Thanks!