EP01 - Major 9 Poly

One of the sounds I use most often is a Major 9th chord, specifically one built from two open-voiced major triads. For example, a C Major 9 chord consists of a C major triad (C-E-G) and a G major triad (G-B-D), both using open voicing (C-G-E and G-D-B). The G major triad is built starting on the fifth of the C major triad. The result is a voicing of C-G-D-E-B. One could also use a Polychord-style notation to express the sound. In this case G upon C⁠.

Here is the chord structure using the

Diatonic Interval-Based Notation: 1-5-9-11-14

and

Chromatic Interval-Based Notation: 0-7-14-16-23