semicord

Em9 E minor ninth chord

Notes
E G B D F#
Formula
1 b3 5 b7 9
Semitones
0 3 7 10 14 above the root
Other symbols
Emin9, E−9

E to G is a minor third (3 semitones), G to B is a major third (4 semitones), B to D is a minor third (3 semitones), D to F# is a major third (4 semitones). A minor seventh (Em7) with a major ninth on top: F#, 14 semitones above E. The fifth, B, is the note players drop first.

Em9 on the piano

C4D4E4F4G4A4B4C5D5E5F5G5A5B5C#4Eb4F#4Ab4Bb4C#5Eb5F#5Ab5Bb5C4EGBC5DF#

Root position from E4: E4, G4, B4, D5, F#5. Middle C is C4.

Em9 on the guitar

Standard tuning (E A D G B E). Strings run low E on the left to high e on the right, frets downwards; × is a muted string, ○ an open string, and each dot shows the note it sounds, with the root in blue-green. Every shape below has E as its lowest note.

EBBDGBF#F#
Open position (E-shape)
0 2 0 0 0 2 (low E to high e)
Sounds E2 B2 D3 G3 B3 F#4
5fr×EEGGDDF#F#BB
A-shape, root on the A string at fret 7
x 7 5 7 7 7 (low E to high e)
Sounds E3 G3 D4 F#4 B4

The E-shape and A-shape grips are movable: an E-shape chord's root is the note under your first finger on the low E string, an A-shape chord's root is the note on the A string. Slide the same grip up or down to play minor ninth chords on other roots.

Inversions of Em9

An inversion puts a note other than the root in the bass. The name is what semicord's chord finder calls those notes played bottom to top; a slash name like C/E means a C chord with E in the bass.

PositionNotes, bass firstNamedListen
Root positionE G B D F#Em9
1st inversionG B D F# EEm9/G
2nd inversionB D F# E GEm9/B
3rd inversionD F# E G BEm9/D
4th inversionF# E G B DEm7/F# (also read as Em9/F#)

Where Em9 fits

Em9 is ii9 in D major, vi9 in G major, i9 in E minor. Its upper four notes G B D F# are Gmaj7, the usual rootless voicing of Em9 over a E bass.