Watch the Scotch 'n Soda online guitar lesson by Robbie Calvo from The Rhythm Architect

Using double-stops to create guitar parts is a great way to add interest and not take up too much space in the sonic frequencies. I'm using a riff based idea to cover the A7 chord and major sixths to outline the D9 and E9 chords. Once you've got this part down try composing your own double-stop line that works well over guitar part no.1.