Offset Configuration - kbz/SIFTrain GitHub Wiki

In order to enjoy of a good sync, you'll need to determine 2 different factors that will affect your gameplay:

Global Offset - Used to compensate for drawing time, the time it takes for the processor to draw the game screen
Input Offset - Used to compensate for input delay related to the time it takes for the device to register an input.

Go to Settings>Timing Settings and set both offsets to 0ms
Go to Settings>Volume Settings and enable hit sounds, reduce the volume of the song to about 75 and set the feedback volume to 100
Save and Return.
Play > select any beatmap you usually play
Tap the screen and let the notes start popping.
Listen to the song vs the hint sounds.
If the hint sounds are coming out late, you need to compensate with NEGATIVE offset.
Go back to the Settings>Timing Settings and update the Global Offset (If negative offset is needed, move the slider to the left side, right otherwise) until you find the equilibrium point.
Save and Return
Repeat 4-9 until you find the spot
Play a song (It is recommended to play a full song)
In the results screen, check the Accuracy Range bounds and the Avg. Accuracy and find the center spot.

For example I had -30.42ms to 20.03ms with an average accuracy of -3.11ms. The center would be at -5ms about and after adding my average accuracy, the value would be the center between those 2 values. In this case, I'd compensate it with 4ms. of POSITIVE offset.

Go to Settings>Timing Settings and update the Input offset by the amount required to turn the center into 0.
Save and Return
Repeat 12-15 until you find the sweet spot

In general, one shouldn't need to change the input offset unless their device is old or unresponsive.

How to identify my sweet spot?

The sweet spot is easy to identify: (the following values are visible in the results screen)