Guitar diminished 7th chord images. Diminished 7th chords are unique. They have four names, one for each note in the chord. They also repeat themselves every three frets.
The triad form found in the 7th note of the major scale doesn’t repeat itself like the seventh.
The diminished 7th is made up entirely of minor third intervals.
The seventh for these chords is actually a 6th if you were to use the major scale to make them.
They can be made from the Chromatic scale by selecting 4 minor 3rd intervals or notes that are 3 frets form the last one.
The minor 7th flat 5 chord is almost identical except that the 7th is really a 7th and not a 6th. A lot of lesson books used to use the diminished 7th in place of the minor 7th flat 5 chord.
G♯, B, D and F Diminished 7th Chords
Each chord can be used for four different chords. The same notes just a different name. This is called plurality, a lot of other chords have more than one name. An Am7 chord is also a C6 chord.
The Notes for these chord are G♯, B, D and F.
This chord can be made from the 7th note of the A Harmonic minor scale
A, C, E♭ and G♭ Diminished 7th Chords
The Notes for these chords are A, C, E♭ and G♭.
This chord can be built from the B flat Harmonic minor scale.
Sometimes in a song when they call for F diminished you may have to play an F form where the low pitched note is an F for it to sound right and other times it may not matter. These chords usually only last one bar or less.
They can be used for leading to another chord too like a passing tone leads to a scale note.
B♭, D♭, E and G Diminished 7th Chords
The Notes for these chords are B♭, D♭, E and G.
This chord can be built from the B Harmonic minor scale.
The B♭ will be an A♯ in this key but still the same chord notes.
There are some other chord forms but these are the most common.
These chords have some good uses check out my page Diminished 7th Chord Theory
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