There are those musicians who tune their guitars only at the start of a show, and then they're hands-off. Then there are those who are constant tuners -- habitually tuning and re-tuning their strings. This is Shawn Mullins... a constant tuner!

My theory is only those with truly the best music abilities feel the need to repeatedly tune their instruments. They just seem to have an ear for perfection. And as a result, they deliver only perfect-sounding tunes.