Simple "tap to the beat to calibrate" function.
For me, it's not just visual/audio lag from my monitor, but also hardware lag from my tablet; osu! registers clicks a few dozen milliseconds after I hear the pen hitting the tablet, and using the manual calibration is difficult because there is no standard to compare to for lag on the input device.
For me, it's not just visual/audio lag from my monitor, but also hardware lag from my tablet; osu! registers clicks a few dozen milliseconds after I hear the pen hitting the tablet, and using the manual calibration is difficult because there is no standard to compare to for lag on the input device.