Brief Analysis
"Grant’s Dimensions" utilizes a unique 20-bar form that stands out as a brilliant hybrid of modal jazz, side-slipping minor chords, and whole-step shifting dominant harmonies.
The form divides into three distinct phrases, defying standard 12- or 16-bar grids:
Bars 1 to 16 - Dominant Chords Shifting
The first part is built with the same short line made of a chromatic dominant pattern concluding with a dominant 3-note chord (b7 3 13).
This pattern is transposed and repeated following a dominant 13th chords alternating between pairs like Bb7(13) and Ab7(13) followed by a shift down to Eb7(13) and Db7(13), then Bb7(13) and G7(13).
Bars 18 to 19 - Stepwise Modal Sequence
The midsection shifts mood entirely, steering away from dominant chords into a soaring sequence of parallel minor 11ths that climbs steadily step-by-step. Cm11, Dm11, Em11, Ebm11 and Dm11.
Bar 20 - Altered Turnaround
The final four bars feature the harmonic centerpiece that gives the song its sophisticated "dimension". Grant altered dominant chord (G7#9b13) and voice-leads it down a half-step to resolve onto a Gbmaj7.