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 ...

The 9th (D) is provided by the open first string. Play a regular C chord and you’ll get Cadd9. The 6th (D) appears on the open fourth and first strings here, giving this chord an unusual feel ...