Reference : other extensions jazz symbols
Minor seventh, major ninth and perfect eleventh intervals
11 adds minor seventh, major ninth and perfect eleventh intervals to a triad (Bb, D and F in this example):
Minor seventh, major ninth, perfect eleventh and major thirteenth intervals
13 adds minor seventh, major ninth, perfect eleventh and major thirteenth intervals to a triad (Bb, D, F and A):
We present the chords with all their notes for explanatory purposes. In practice, it is rare to include all the notes due to the sound density produced. In the above example it would be common to eliminate the third to avoid clashes with the eleventh.
Altered Extensions
Minor and augmented ninths, augmented eleventh and minor thirteenth are written in parentheses:
| Minor | Augmented | |
|---|---|---|
| 9th | C13(b9) | C13 (#9) |
| 11th | C13(#11) | |
| 13th | C11 (b13) |
Some examples:
See also:
