Am7b9bb5

[trewq]

Am7b9bb5 A Minor 7th Flat 9th Double Flat 5th

This is a chord in F Major. The only chord name I've seen for this note group - using a chord name generator.

A Bb C D G

Is this acceptable to you, to see a double flat in a diatonic chord name? Can it be found in any book of chords/scales?

Is there a better choice for a chord or scale name for this?

I just want it to show on a list for the Major scale.

[imrae]

I find the D more believable as an 11th than as a double-flat 5th. Think the automatic namer is trying too hard to rationalise the missing 5th. So something like Am11b9-5?

[BertKoor]

G A Bb C D - These are five consequitive notes. You need more context to assign a chord name.

[trewq]

@BertKoor, good point, the best name would depend on the context - inversion or base note I guess is what you mean. But this is for a list generator where only the chord and scale type formulas are hard coded, and only unique note groups are shown, given filters selected. Otherwise the lists would be too long. There are the necessary limitations with software, and needs musicianship to fill in the blanks.

@ imrae, that might be the most common solution, but it would be the only chord type in my collection that specifies a deleted note. I came up with another name for it: D7sus4 add b6. I think I've seen this one before on line too somewhere, I hope, I just don't want it to look like I've pulled it out of my arse. Thanks.

[Nspace]

Probably better if it looks pulled out of thin air... or as you said, if it wasn't at all.

[dino basi]

Depending on the root note it could be Bb maj7 (9,13) could also be written as Bb maj7 (6/9)..... or Gmin add 9,11 (no 7th)...... a G minor chord with 9 and 11 would normally have a minor or major 7th though not in this case. These would be your most common choices. Flat 9 on a minor chord is unusual (dissonant), flat 9ths are usually found on dominant 7th chords.

[trewq]

Thanks dino basi,

It connects well with the F 69 and is a perfect example of the need not to depend too much on a chord list, or commonly used ones, when connecting chords - I learned to play using the Mel Bay guitar chord encyclopedia.

Other 5 tone chords in F not found in it:

A Bb E F G
A Bb C E F
A D E F G

BTW there is a option in Chordwarepa to show ALL filtered note groups naming only the ones found in the library.

[jancivil]

you can take this as a mind-expanding thing, not everything in vertical sonorities has to be thought of in thirds. A lightbulb moment for me came when this bass player at school did a quick little ear training test for a small collection of us in one of the cells, playing constructions built in P5ths on a piano. It was a blind test. I accurately described the thing as a tertial construction but it wasn't constructed that way in intent. So I started at once thinking in terms of fifths.
CF: C G D Eb Bb F Gb Db Ab A E B. Very sonorous, very musical, all twelve tones...
weird to name unless you go with "P5" and "b2".
There is no chord chart kind of a thing to tag it by, just unwieldy to try.

Those things [A Bb E F G etc] are not tertial constructions at all though. Those are secondal sonorities. In an harmonic setting you probably do want to relate it to convention, of course. A Bb E F G is not going to shoehorn easily into function, though.

You don't have to name them. Names of things shouldn't be thought of on the same level as the thing-in-itself.

[jancivil]

double diminished fifth almost doesn't exist in music btw. and I'm being ultracareful with the qualification 'almost'.
Occam's Razor: "perfect 4th". You'll need vastly fewer assumptions to get there.