Help With Remixes

[ammarg89]

I have a couple of questions on making remixes, ive been making beats forlike 5 months now but still having trouble with remixes. How do you detrmine the actaull tempo of an acapella? On fl studio the reaidngs ar way wrong syaing like 45bpm or like 140bpm but im sur ethat wrong. And also how dyopu get the drum pattern to fall in sync with the pella? I was thinking maybe chop the pella into 4 bar samples and time stretch it and doing each 4 bars on its own but thatl take like 2 weeks. And lastly hw dyou get the acpella and teh beat to sound correct as in sound quality, like what vsts would help with that?