osu!mania | Offset/Hitsounds Demonstration
An attempt to show the difference between playing keys-to-music, where you use the music as the reference of when to tap, and hitsounds-to-music, where you play by 'syncing up' the hitsounds to be exactly with the music.
Either way is neither "correct" per se, but some players might find the keys-to-music method to be more intuitive.
