Diminished seventh chords

With
Tim RichardsTim Richards breaks down the diminished seventh chord - its minor-third symmetry and how a C# diminished links C7 to G - plus practising its inversions.
What's in the course
29 lessons (1h 19m) · 1 free
01. Playing the roots
2:34

02. Two-feel bass line
2:26

03. Two-feel bass line (performance)
1:12

04. Guide tones
3:00

05. Two-feel bass with guide tones (performance)
1:06

06. Adding right-hand chords
2:37

07. Two-feel bass with chords (performance)
1:08

08. Walking bass lines
5:31

09. Walking bass line (performance)
2:12

10. Chordal rhythms
5:05

11. Rootless voicings
5:15

12. Walking bass line with rootless chords (performance)
1:10
Lesson transcript
Exploring Diminished Chords in Gospel Groove
We're just going to spend a little bit of time looking at these diminished chords that cropped up in gospel groove. The C sharp diminished seventh in particular is our focus.
Function of the C Sharp Diminished Chord
This chord acts as a link between the C7 chord and the G chord.
However, the G chord is played with the D in the bass (the fifth in the bass). This is to achieve a rising bass line, which sounds nice and is a significant element of many gospel tunes.
Practicing the Diminished Chord
Now, let's just focus on the diminished chord.
It's probably a good idea, if you don't already know them, to practice its inversions.
- Do this with a metronome.
- Here it is at 102 clicks:
- Play the chord (2, 3, 4),
- using the same fingering for each shape.
Understanding the Symmetry
Because the diminished chord is a symmetrical chord, every interval is a minor third. When you invert it, you're not changing the pattern or shape; it's still a series of minor thirds stacked on top of each other.
- The first inversion of a C sharp diminished chord is the same as E diminished.
- The second inversion is the same as G diminished.
- The last inversion could be B flat diminished.
How to Identify Inversions
So how do you know? How do you decide? It really depends on what's happening in the bass. This is why I've called it C sharp diminished, because it has a C sharp in the bass.
However, you could play any of these inversions, and they all function as C sharp diminished, even though they may look like other chords in the same family.
The Diminished Chord Family
This family goes up in minor thirds:
- C sharp, E, G, B flat.
Also, there are two other families to get to know:
- D diminished, F diminished, A flat diminished, and B diminished (one family).
- E flat diminished, F sharp diminished, A diminished, and C diminished (the remaining family).
Now, you've covered all 12 diminished chords.
Using Diminished Chords in Practice
Sometimes, you might see or hear all four diminished chords played in a single bar under the banner of just one of them. For instance, in gospel groove, you might play C7, followed by C sharp diminished with four shapes.
- This is a great way to fill that bar as long as you transition smoothly to a G chord without jumping.
- Think about how the last one, B flat diminished, resolves to G. Don't make a big jump there.
Conclusion
When you see a diminished chord in a chart, you can play any of the four chords in that family. Remember this, as it's a chord that you'll see more often in the future.
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Meet your guru

Meet your guru
Critically acclaimed jazz pianist and composer Tim Richards is one of Britain’s most experienced jazz educators, teaching piano privately for over 30 years, as well as at Morley College, Goldsmiths College, the University of Surrey, Premises Studios and other venues in the UK and abroad. He has produced numerous titles for Schott Music, including the best-selling two-volume Exploring Jazz Piano, Blues, Boogie & Gospel Collection and the acclaimed Improvising Blues Piano. He is also co-author, with John Crawford, of Exploring Latin Piano and Brazilian Piano Collection.
More recently Schott have published Jazz, Latin & Modern Collection (15 pieces for solo piano), comprising Tim Richards originals alongside pieces by Duke Ellington and Thelonious Monk, and the two volume set Beginning Jazz Piano (now a two-part MusicGurus course).
“The real joy of Tim’s music… is that it is both hugely educational but also such great fun to play. Anyone with the slightest interest in learning to play or teach jazz piano should really acquire a set of Tim’s books.” PianoDao
As a performer Tim has been a presence on the UK jazz scene since the 1980s, also playing the blues with UK and US legends such as Otis Grand, Earl Green, Dana Gillespie, Larry Garner, Joe Louis Walker and Mojo Buford. He has released over a dozen albums as a leader (featuring many of London’s best jazz musicians including Pete King, Gilad Atzmon, Tony Kofi, Jason Yarde, Seb Rochford, Ed Jones, Dick Pearce and many others), and toured all over Europe with line-ups ranging from duo to nine-piece. His latest recording, the album ‘Telegraph Hill’ by the six-piece Hextet, was described in The Observer as "A true joy from beginning to end".
More info can be found on his website www.timrichards.ndo.co.uk




























