Hey,
I think we are talking past each other here Mark. ie potentially using differing definitions.
What I mean is: can I record changes in tempo or at least, gradually change the tempo after recording.
Playing at various tempos during a single piece, is very natural for musicians.
In some DAWS you can map tempo to a controller, and record those movements. This is what I mean by automation.
Some DAWS even allow you to play at a varying tempos, without a click and try and work out the tempo fluctuations later, to map a grid to it.
Thanks,
Ian