They don't list it because it fits so well as an Ebmaj7, that there's very little reason to call it something else. As a Gmin add b13, it's almost a tone cluster. That flat thirteen, or flat six,or sharp five, is just so discordant with the five in the chord, that it would rarely be used in polite company smile

Now, if you separate the Eb from the D by an interval of a major seventh, then the ear is not as "jarred." Then, also, there's more reason to call it an Ebmaj7 chord. Again, when you have chords with five notes, that spell so perfectly a certain chord name, even though it acts as another chord because of the leading of the notes and the bass note, most folks would still call it by the name that fits it the most. It's just for convenience and good communication. If I tell a piano player to play me and Ebmaj7, she'll jump right on it, if I tell her to play a Gmin add flat thirteen, she might take a few seconds to figure it out. Fow quick reading, use the most common chord name.

What? You won't wait nine or ten measly hours for HONOR! What's this world coming to?

Mike

You've got to know your limitations. I don't know what your limitations are. I found out what mine were when I was twelve. I found out that there weren't too many limitations, if I did it my way. -Johnny Cash

It's only music.
-niteshift

Mike Dunbar Music