The Lines Are Open! - An open 027 Trichord line
Here's a basic description, with an example, of the 027 Trichord (aka 2+5, or Major & minor scale steps 1-2-5, in prime form), which will more than likely be the subject of a future book.
It's a familiar sound, becoming popular among improvisers of the 1960's, and heard in the music of John Coltrane, McCoy Tyner, Joe Henderson, Woody Shaw and many others of that period and beyond.
Because 027 (C-D-G, in C) contains the intervals of a Maj 2nd, a Perfect 4th, and a Perfect 5th, it's relationship to the Pentatonic Scale becomes apparent. Adding a pair of P4ths to either end of an 027s 1st Rotation forms a pentatonic scale in fourths (E-A-D-G-C = C Pentatonic, or D-G-C-F-Bb = Bb Pentatonic).
The structure of the 027 trichord lends itself to open, quasi “in and out”, sometimes ambiguous polytonal melodic and harmonic possibilities, especially when stringing together multiple, overlapping 027s.
It's a familiar sound, becoming popular among improvisers of the 1960's, and heard in the music of John Coltrane, McCoy Tyner, Joe Henderson, Woody Shaw and many others of that period and beyond.
Because 027 (C-D-G, in C) contains the intervals of a Maj 2nd, a Perfect 4th, and a Perfect 5th, it's relationship to the Pentatonic Scale becomes apparent. Adding a pair of P4ths to either end of an 027s 1st Rotation forms a pentatonic scale in fourths (E-A-D-G-C = C Pentatonic, or D-G-C-F-Bb = Bb Pentatonic).
The structure of the 027 trichord lends itself to open, quasi “in and out”, sometimes ambiguous polytonal melodic and harmonic possibilities, especially when stringing together multiple, overlapping 027s.
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