Watch the Polka Dots and Moonbeams online guitar lesson by Mimi Fox from Jazz Performance
This is a great technique that adds color to your playing. When I play solo, Iam keenly aware of the fact that it's just me playing. Without a group behind me I have my work cut out for me in terms of creating a colorful solo. Muting lines provides a nice shade to add and it's something that you can work on easily in your practicing. Notice the impact on the listener when the softer muted lines occur.