Tempo Matching in Logic Pro X
Here we'll walk through several options for tempo matching an audio file / sample to your project in Logic Pro X. Some reasons you might want to do this might be:
Using a sample that has a different tempo from your project
Using audio that was recorded without a metronome and has inconsistent timing
Stretch or compress an audio file or sample for creative effect (for example, 2x speed, half speed, etc.)
In addition to this written summary, here's the video tutorial walking through it: