Calibrate shifts scoring only, for your device and input delay. Map nudge shifts the click, the lights and scoring together. Use it with the click on and the drums solo: if the click sits in front of or behind the ride and hi-hat, nudge until they fuse. Report the number so it can go into the beat map.
Find the beat inside a real swing song. Turn the drums, bass, piano and horns on and off, pick the counts you want to hit, and tap. Every tap shows how many milliseconds early or late you were.