An odd chord expansion? / "Materialize chord"
Musescore community / General discussion Forum
Recently I encountered an uncommon, bizarre chord notation: A5-7.
This pattern is accepted by Musescore as a legitimate, valid chord notation.
An attempt to figure out what it really means - using the Musescore "Materialize chord" option -
yields the E-G-A combination, as depicted in the attached PNG.
A collegue of mine - who is a professional musician (while I am not) - now wonders, much like I do:
How come that this is the resulted chord expansion?
Starting with A5 - which is a perfect fifth - is obvious and well understood.
It contributes the "E" and the "A" to the materialized chord.
Now - the question relates to the chord extension.
The implied operation is undoubtedly "add".
As one might expect, it attempts to add the 7th degree relative to the chord root, and - due to the "-" presence - lower it by a semitone - right?
If this is the case - the added note should have been Gb, not G (?).
So, what does A5-7 mean in this context of the materialized chord expansion?
Did I miss something here?
A clarification will be appreciated.