I want to make tempo changes where the whole recording gradually slows down or speeds up (rallentando, accelerando etc...) mostly as an ending but sometimes in the middle of a song before returning to the original tempo (a tempo).

Is this possible? I know I can change the tempo bar by bar in bar settings but can it be done as a gradual continuous change?

It will be with real tracks by the way, no midi.

Thanks in advance for any responses.