E7(9) = E9 Chord on Guitar
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Major chords [chords based on a major triad]
CC(add9)C6C6/9Cmaj7Cmaj7(9)Cmaj7(13)Cmaj7(#11)Cmaj7(#5)C7C7(9)C7(13)C7(b9)C7(#9)C7(13,b9)C7(b13)C7(#5)C7(b9,b13)C7(#11)C7(b5)Minor chords [chords based on a minor triad]
CmCm6Cm6/9Cm(add9)Cm7Cm7(9)Cm7(11)Cm7(13)Cm7(b13)Cmmaj7Cm7(b5)Cm7(11,b5)Sus chords [3rd suspended and replaced by a 4th or 2nd]
Csus4Csus2C7sus4C7sus4(9)C7sus4(b9)C7sus4(13)Augmented chords [major chords with augmented 5th (#5) ]
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The E7(9), or mostly abbreviated just E9 is a dominant 7th chord („V7 chord”) with an additional major 9th F#. The major 9th is the same tone as a major 2nd and therefore can be found 2 frets (a whole-step) above each root tone or 2 frets (a whole-step again) below the major 3rd on the guitar. But since it extends the chord it is written as a 9 in the chord symbol whereas the 2nd only appears in sus2 chords, where it replaces the 3rd.
A E7(9) respectively E9 chord has the notes E (1), G# (3), B (5), D (7) and F# (9). You can omit the 5th, especially if this makes it easier to play on the guitar.
In most cases a E9 chord can be played instead of a plain E7 chord. The voicing 1-3-7-9-5 (root on A string) of the seven-nine chord is one of the basic guitar chords of funk music.
Sometimes you have to be careful: if the E9 chord resolves to a A minor chord (m, m7, m9, etc.) you'll usually have to replace the natural tension 9 with an altered tension and play E7(b9) or E7(#9) instead.
If the m7 chord on the III. degree of a major scale has been changed to a V7 chord (the minor dominant), you'll also replace the 9 with b9 or #9, whatever chord it resolves to. In the following example you can see a V7 chord on the IIIrd scale degree (extended with a #9 here) and another one on the bVIIth degree, where the 9 is appropriate again:
Cmaj7 E7(#9) Fmaj7 Bb9
must know
You should memorize these chords, if you are using this chord type frequently.
open chords
At least one string is ringing without a finger touching it. We call this an open string and consequently that chord an open chord. You can't transpose these chord shapes to a higher key, unless you're using a capodaster or mute the open string or the open string then represents just a different chord tone.
moveable
You can transpose these chord shapes to any different key just by moving the whole chord shape along the guitar fretboard until the squared spot represents the new root.
capodaster
The pleasant sound and sometimes easier playability of an open chord can be put into practice by mounting a capodaster on the indicated fret. Of course that may goe along with the disadvantage of not being able to use the frets lower than the capo anymore.
