Watch the Aadd9 Arppeggio online guitar lesson by Brad Carlton from Guitar Lab: Melodic Options

This lesson presents an Aadd9 arpeggio in the 9th position. This arpeggio is a strong skeletal framework for soloing over the IV chord. After you've absorbed the sounds (colors) of these pitches, you can systematically add the remaining scale tones out of the A Lydian mode. These pitches are the 6, 7, and #4.