Root, third and seventh: the guide tones fix the quality, so the fifth is dropped. That is what leaves a string free, so pick a tension to put on top.
Eb69 is Eb, G, Bb, C and F — Eb6 with the ninth added as well.
It sounds wide and entirely at rest. The modern way to voice a tonic when a triad is too bare and a maj7 too pointed.

| Eb | G | Bb | C | F |
|---|---|---|---|---|
| 1 | 3 | 5 | 6 | 9 |
Tonic — it commits to nothing.
Also written Eb6/9, Eb6add9 or Eb six nine. The same chord either way; which spelling you meet depends on who wrote the chart.
Root, third and seventh. The third and seventh, the guide tones, are what make the chord major, minor or dominant, so the fifth can go: it says nothing the symbol needs.
Three notes means a spare string, which is the real point. Put a tension on it.
Eb69 has 5 of them, on the top four strings, the middle four strings, the bottom four strings and strings 5-3-2-1, from open position up to the 12th — all in one inversion, so the bass note never moves. The one to learn first is the Eb shape at the nut, which is the easiest grip here.
Start with x63543 — no barre and low, at the 3rd fret. 1 of the 8 shapes here sits in open position. 7 of the 8 need a barre. Together they cover the neck from the 1st fret to the 13th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| xx1011 | open position | Eb, root position | F | barred |
| x33343 | 3rd fret | C, 6th in the bass | G | barred |
| x63543 | 3rd fret | Eb, root position | G | all fretted |
| x65566 | 5th fret | Eb, root position | Bb | barred |
| x88888 | 8th fret | F, 9th in the bass | C | barred |
| 11-10-10-10-11-11 | 10th fret | Eb, root position | Eb | barred |
| x-x-13-12-13-13 | 12th fret | Eb, root position | F | barred |
| x-13-13-12-13-13 | 12th fret | Bb, 2nd inversion | F | barred |
The same notes rebuilt from scratch give 14 drop 2, 9 drop 3 and 15 rootless voicings, each on its own page.
Tensions. A shell of Eb69, root, third and seventh, leaves a string free, and the tones that belong over it are the #11 (A).
How you get to it. The turn that lands on Eb69 is Fm7 to Bb7 — the ii and the V of Eb — and Bb7 shares its third and seventh with Fm7, so the hand barely moves between them.
In which keys. Every note of Eb69 belongs to C minor (the ♭III), Eb major (the I), F minor (the ♭VII), G minor (the ♭VI), Ab major (the V) and Bb major (the IV).
Eb69 is every note of the Eb major pentatonic, and nothing else. It also sits inside Eb major, Eb lydian, Eb mixolydian and Eb lydian dominant.
Change one note of Eb69 and you have Ebmaj9 (the sixth becomes a major seventh), Ebmaj13 (add the major seventh), Ebm69 (the major third becomes a minor third), Ebadd9 (drop the sixth), Eb6 (drop the ninth) or Eb9 (the sixth becomes a flat seventh).
Eb69 is a major chord — root, major third, fifth. Major chords on every root.
On Eb69’s sound and use this page follows Mark Levine, The Jazz Piano Book (Sher Music, 1989). The shapes and the derived voicings come from different places, and both are explained in where the chords and the theory come from.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.