1-2-3-5 sequenced from every pentatonic scale tone, twelve keys
Start with the major pentatonic — five notes, no 4, no 7.
Play four consecutive pentatonic tones starting
from each scale degree in turn: from the root, then the 2nd, the
3rd, the 5th. Four groups, sixteen eighth notes, two bars. The
first group is 1-2-3-5; the pentatonic's uneven steps mean the
shape shifts at each new starting note — that irregular contour is
part of the sound.
Pentatonic has no half-steps within it, so the sequence is
internally consonant at every position. Coltrane built whole solos
on these cells; McCoy Tyner did the same with his hands. The
sound is open, modal, devoid of leading-tone tension — exactly
what makes modal jazz sound "floating" rather than cadential.
Both hands: the LH now holds a rootless Imaj7
voicing (3-5-7-9) under the running pentatonic cells — the RH
pattern itself is unchanged.
Cell
1 – 2 – 3 – 5 (the pentatonic's first four scale tones)
Sequence
Four consecutive pentatonic tones from each of the first four scale degrees, in order
01
C major
02
F major
03
B♭ major
04
E♭ major
05
A♭ major
06
D♭ major
07
G♭ major
08
B major
09
E major
10
A major
11
D major
12
G major
Five notes, no half-steps. Four cells, sequenced. The melodic shape that wouldn't ever resolve — and didn't need to.