D#madd9 chord
D# minor added ninth
<
1 / 1
>
3
5
7
10
The D#madd9 chord has the formula 1, b3, 5, 9 with notes D#, F#, A#, F
The minor added ninth chord can be built by taking a minor chord and adding the 9th of the scale. It serves a similar purpose to the minor chord, with the additional ninth extension for flavor.