FULL COURSE, TAB, JAM TRACKS: truefire.at More Free Guitar Lessons: bit.ly TrueFire on Twitter – www.twitter.com TrueFire on Facebook – www.truefire.com Major and minor chords are the most commonly used guitar chords utilized in composing a piece of music. There tends to be a structure at a very basic level and from there a variety of moods or as I once heard it, chord qualities, can be interspersed to allow for a broader depth within a tune. Sometimes, however, some terrific pieces of music are comprised of no more than Major and minor chords.