a "goto bpm" function while playing thru virtual deck

so here is why I suggest it. I usually rock just one turntable and a virtual deck. SO what i like to do at times is take lets say david bowies "lets dance" song and slow it down to match p diddys "been around the world" song then blend it. What I am suggesting is a way to just enter in a bpm on the virtual deck then hit enter and have it automatically start slowing/speeding up the song until it reaches that BPM.