To do this, tune into open G by dropping the sixth, fifth and first strings down a tone, then drop the second string down a semitone to a Bb – that’s the all-important minor 3rd in the key of G.

All the chords built on other notes in the scale of ... For example, G7 is made by taking the major triad of G (G - B - D) and adding an F (G - B - D - F). A cadence is formed by two chords ...