Altered chord on C with flat 5th, 7th, and 9th. About this sound Play ( help · info ) (Photo credit: Wikipedia)

Here are some long over due altered chords to share with you. Thanks for requesting
them. You've got to know your basic chords because when you string them together,
you're playing chord progressions which make up a song!

Wikipedia says:

In music, an altered chord, an example of alteration, is a chord with one or more diatonic notes replaced by, or altered to, a neighboring pitch in the chromatic scale.

Altered chords are thus constructed using the following notes, some of which may be omitted:

root
3
♭5 and/or ♯5
♭7
♭9 and/or ♯9

For more information, visit http://en.wikipedia.org/wiki/Altered_chord

Altered Chords

Cmaj7 = C/GBE

C6 = C/GACE

C9 = C/EGBbD

Csus2 = C/GDE

Gmaj7 = G/GBDF#

G6 = G/GBDE

G7+5 = G/GBD#F

Fmaj7 = F/FACE

F6 = F/FACD

Fm6 = F/FAbCD

Fsus2 = F/ACF

Dmaj7 = D/F#AC#

D9 = D/F#ACE

D7-5 = D/AbCDF#

Amaj7 = A/G#C#E

A6 = A/F#C#E

A7+5 = A/GAC#F

Amsus2 = A/BCE

Bm7-5 = B/FABD

Gbmaj7 = Gb/GbBbDbG

Gb7-5 = Gb/GbBbCE

From Jermaine Griggs:

Here is a chord progression which utilizes a series of “altered” chords:
In the key of “Db major”:
“Fmin7 (b5) — Bb7 (b9) — Ebmin7 (b5)”
1)
Bass = F
Right hand = Ab + B + Eb
2)
Bass = Bb
Right hand = Ab + B + D
3)
Bass = Eb
Right hand = A + Db + Eb + Gb

Altered chords are mentioned in a chapter or so in the 300pg Home Course Book

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