Ebadd11 chord
Eb added eleventh
<
1 / 1
>
3
5
7
10
The Ebadd11 chord has the formula 1, 3, 5, 11 with notes Eb, G, Bb, Ab
The added eleventh chord can be built by taking a major chord and adding the 11th of the scale. It is somewhat dissonant because the 3rd and 11th are one semitone apart.