
Chord system
I had a teacher years ago who introduced me to a chord system that involved a few shapes designed to represent (with a few alterations as necessary or optionally) most chords ..... Eg a single shape => Cmajor, A minor, D dominant and a F# half diminished. Wondering if anybody has encountered this system, knows who originated it, and where I might find further documentation on it. I've attached two PNG files based on one shape - the first is the unaltered shape where it's representing Cmajor7 and Aminor7 (with a ninth), the second is a D dominant with the G on the D string lowered to an F# to give you a D7 with a ninth and a 13th, and an F# half diminished with an 11th - there are a few other shapes I could provide if it helps.