Audio/Video Delay Calibration

[SuperFromND]

Users should have the ability to calibrate delay between audio and video. Timing is a very essential part of most rhythm games, especially in more recent years where delay is far less consistent across devices, so this should be considered a glaring omission.

See Clone Hero and Crypt of the Necrodancer as two examples of how the calibration could be handled in-game; the former in particular has very clear and friendly calibration setup, with further manual tweaking in the options menu if needed.