Sometimes a piece does not begin on the first beat of the bar. Any notes which come before the first full bar are called lead-in notes (or pick-up notes). When lead-in notes are used, the last bar is also incomplete. The notes in the lead-in and the notes in the last bar add up to one full bar. When you are playing chords do not strum until the first full bar, after the lead-in notes. The next song uses a lead-in. The Yellow Rose Of Texas begins on the third beat of the bar.