Alexander 23 shares a tempo-perception trick he learned from a collaborator: when a song feels off-speed, don't nudge it a little in the right direction. Push it way too fast, then way too slow, then dial back in. The extreme swings reset how your brain is hearing the track, so you can trust the tempo you land on.
He demos it live in Ableton on an acoustic guitar session, using warp to make the tempo sweeps instant and effortless. Even though the result confirms the faster BPM he suspected all along, he notes that going through the process is what makes him certain.
The same principle applies beyond tempo. Whenever you're dialing in a level, an effect, or a compressor setting, sweeping both directions first can give you a clearer idea for what works and what doesn't, so the final decision comes with more confidence.