What number does the horizontal line between the two vertical lines represent?
1 One horizontal line represents the eighth note and two represent the16th note ... The second question depends on the beat of the tune. Is it 4, 4, 4-2 or something? In 4-4 beats, the eighth note refers to two notes at a time, and of course, after playing the next note, forget it. How long it takes depends on your game speed. If 60 beats is specified, then a quarter is 1 sec.