This week we’re looking at another type of 7th chord, the diminished 7th. I spent a decent amount of time in a previous blog explaining the theory behind the chord and the difference between and diminished 7th and a half diminished 7th, so check out ‘Jazz Building Blocks – Part 1′ for more detail.
In the last few weeks we’ve had to digest loads of different shapes. Well, you’ll be pleased to hear that this week is a lot simpler! Every note of a diminished 7th chord is a minor third apart, so when we do inversions of the chord, the shape stays exactly the same. So, learn these basic shapes and simply slide it up a minor third until you reach the octave.
I’ve stuck to C diminished 7th (Cº) and it’s inversions. I’ve done what we did with the other 7th chords; limiting them to four strings and then skipping strings to get the most of our shapes. Have a look through and digest them into your playing.