Hi Carl,

> I had not heard of quartic chords before reading this email (as I've
> mentioned before, I'm a music novice).  It was very interesting for me to
> study quartic chords.

They form a large part of my harmonic (composition and arranging) language.

> But in my web search and following links, I never found anything that
> approached a notation for quartic chords.  Their existence was discussed,
> but I found no quartic-based notation; it was all just the notes.

There definitely isn’t a standard…  =\

> Do you have any source information that we could use to better understand 
> quartic chord notation?

Not really. In the musical theatre world, the symbol

   C4

is starting to be widely understood as <c f c> (with a C in the bass and no 5th 
in the chord), as distinct from

   Csus4

which is <c f g c>; this parallels the use of C2 / Cadd2 / Csus2 as three 
different chords/voicings; but it’s also sometimes just written as

   F5/C

In the classical world, I’ve seen attempts to make (e.g.)

   CQ4

a standard way to notate

  <c f bf>

but I’ve never seen a real codified “system”.

Sorry I don’t have more concrete info for you. I would just love it if whatever 
chord name system(s) we build for Lilypond are flexible and forward-proof 
enough to support a quartal naming convention (as just one example), if one 
ever gets established.

Thanks,
Kieren.
________________________________

Kieren MacMillan, composer
‣ website: www.kierenmacmillan.info
‣ email: i...@kierenmacmillan.info


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