Accords de septième diminuée

Tim Richards
Tim Richards

Lesson time: (3min 39sec)

Tim Richards décortique l'accord de septième diminuée - sa symétrie en tierces mineures et comment un do# diminué relie do7 à sol - et travaille ses renversements.

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This lesson is part of the course Piano jazz : l'accompagnement
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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.

About the instructor

Tim Richards
Tim Richards

Salué par la critique, le pianiste et compositeur de jazz Tim Richards est l'un des pédagogues de jazz les plus expérimentés de Grande-Bretagne, enseignant le piano en privé depuis plus de 30 ans, ainsi qu'au Morley College, au Goldsmiths College, à l'University of Surrey, aux Premises Studios et dans d'autres lieux au Royaume-Uni et à l'étranger. Il a produit de nombreux titres pour Schott Music, dont les best-sellers en deux volumes Exploring Jazz Piano, Blues, Boogie & Gospel Collection et le très apprécié Improvising Blues Piano. Il est également coauteur, avec John Crawford, de Exploring Latin Piano et Brazilian Piano Collection.Plus récemment, Schott a publié Jazz, Latin & Modern Collection (15 pièces pour piano seul), réunissant des originaux de Tim Richards aux côtés de pièces de Duke Ellington et Thelonious Monk, ainsi que le coffret en deux volumes Beginning Jazz Piano (désormais un cours MusicGurus en deux parties).“La véritable joie de la musique de Tim… c'est qu'elle est à la fois extrêmement pédagogique et tellement amusante à jouer. Quiconque a le moindre intérêt pour apprendre à jouer ou à enseigner le piano jazz devrait vraiment se procurer un ensemble des ouvrages de Tim.” PianoDaoEn tant qu'interprète, Tim est une figure de la scène jazz britannique depuis les années 1980, jouant aussi le blues avec des légendes britanniques et américaines telles qu'Otis Grand, Earl Green, Dana Gillespie, Larry Garner, Joe Louis Walker et Mojo Buford. Il a sorti plus d'une douzaine d'albums en tant que leader (avec bon nombre des meilleurs musiciens de jazz de Londres, dont Pete King, Gilad Atzmon, Tony Kofi, Jason Yarde, Seb Rochford, Ed Jones, Dick Pearce et beaucoup d'autres) et a tourné dans toute l'Europe avec des formations allant du duo au nonette. Son dernier enregistrement, l'album ‘Telegraph Hill’ du sextet Hextet, a été décrit dans The Observer comme "Un pur bonheur du début à la fin". Plus d'informations sur son site web www.timrichards.ndo.co.uk read more

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