Open Tunings. Open tunings offer guitarists an opportunity for a fresh new view of the instrument & an expansion of their creative options. From Open D to tuning in fourths, here are more than 20 of the most common open tunings. With a tuning diagram, diagrams for the most common chords, & scales shown in notation & tablature for each tuning, this book is a handy reference for everyday use. You also get tips on how to transpose songs to other keys, an explanation of chord symbols, the basic chords in standard tuning & a chord/scale chart showing you which scales to play over the most commonly used chords.