In this beginner FL Studio tutorial, I show you the clean way to do a tempo change (BPM switch) throughout a song—without your samples going out of sync or getting weirdly pitched. I start with a simple example: a tropical house beat at 101 BPM, then I slow the intro down to 80 BPM and bring it back up to 101 after the intro. The key first step is enabling realtime stretching for all samples (Tools > Macros > Switch realtime stretching for all samples). That’s what keeps everything locked to the grid when the tempo moves. After that, I walk you through creating tempo automation clips the right way: highlight the section, set the tempo, then right-click the tempo and create an automation clip. I also show how to avoid that harsh “instant jump” by merging automation clips (Ctrl + Alt + G) and shaping a smoother curve. And if you’re dealing with multiple tempo changes, I explain why it’s often easier to make separate clips first and merge them later, or copy/paste exact values instead of plotting points manually. Finally, I cover a real-world warning: tempo automation can make recording vocals later a pain, so it’s usually better to record vocals first or render the instrumental in place before tracking.