Watch the Chords in Open E Tuning online guitar lesson by Andy Aledort from Slide Guitar Power
To play with authority and confidence in an open tuning, it is essential to learn the proper chord shapes and voicings that are fretted without the slide. Most blues tunes are played within I-IV-V (one-four-five) chord progressions, so these chord shapes must be addresed first. Using the open E tuning, let's assume that the song is in the key of E and the E chord is the I (one), which makes A (or A7 and its variants) the IV (four) chord and B (or B7 and its variants) the V (five) chord. Learn the essential shapes for the three chords in a I-IV-V blues progression in the key of E and then expand from there. Learning these shapes will enable one to easily switch between conventional chording and using the slide to play single note licks and melodies.