We continue our series in open tunings with another ‘C’ tuning, but this is different to open Csus2 because the strings are tuned to a major chord, not a suspended sound – and that changes ...

All the chords built on other notes in the scale of C are ... a seventh chord. The dominant seventh of a V chord can be shown by the symbol V7. For example, G7 is made by taking the major triad ...