Just watched the warping acapellas video thought I would share another way quick way I have found works for me if you are planning on doing a remix.
Get a copy of the original song you are planning on remixing put it into the arrangement view.
Warp it as normal
When you have the original bpm set of the track this as the global bpm
On the original track underneath where it says warp it says slave click that so it says master.
Drag the acapella of the track into the arrangement mode make sure warp is not highlighted click on the part that says slave so it then says master.
Then click on warp
The Acapella will now have exactly the same warp settings as the original track and I have found perfectly lines up with the original.
Save the settings on the acapella delete the global automation and happy remixing.
This is also works for remix stems .
If this has already been discussed feel free to delete it just thought I would share something I came across that someone might find helpful.
i’ll try this next time, thank you!
If you have any problems let me know and I will try and find the video I watched for you