I need to sound like the Edge! How do I get that U2 sound?

By far the easiest way to set this up is with the quick start settings.

What you want to do is simply tap in with the tempo of the song. 

At the beginning, you would tap for each of my strums.

So it would be "1, 2, 3, 4" - count as you tap

Then pick your notes twice as fast and you have it!