For Db7 we have another barre chord, which means our index finger will be placed entirely across the fret. In this case we cover the first fret making sure all the strings sound when played. It will take small adjustments in the beginning to find the best placement where there are no muted strings. After you have all the notes on the first fret use your middle finger to play the second fret of the A string. Once you have your index finger comfortable with the barre, this is a very easy chord.