Back to chord building!!
My first blog post here was a reminder of the original “240 chords in 6 minutes” video that I put on Youtube. It was the first of three videos on chord structure which teach a system of increasing chord repertoire to 1200 possible chords in 4 note harmony. The video here is the “next step”, which folks have asked about: “How do you make the more complex chords?”
Those would be ninths, elevenths, and thirteenths. On the guitar, we have logistical issues which arbit for a minimalistic approach, eliminating some notes while adding others, usually trying to preserve the 3rd and 7th, which are the notes which help distinguish between major, minor, and dominant chords.
The general rule is that a ninth, eleventh, or thirteenth chord can be substituted for a seventh chord, although the context helps dictate when this is not appropriate, and sometimes an “altered” chord (the subject of an upcoming blog video) is preferred. For now, just consider this exercise as part of building a chord repertoire.