Re: polychords: what's the current state-of-the-art?

[Lukas-Fabian Moser]

Hi Kieren,

> What's the current best snippet for rendering polychords? I know the GSoC chord stuff is still in air traffic control, but the snippet found at <https://lists.gnu.org/archive/html/lilypond-user/2012-02/txtmAr2kxZ1Uy.txt> definitely doesn't work, and is likely far from optimal given the decade-plus of advances in the codebase.
>

I don't have much time at the moment, but as a first pointer:

The snippet worked as late as 2.18.2. What broke it after that is that the meaning of c1:5.9-.11.13- in chordmode has changed:

\version "2.18.2"

\chordmode {
  c1:5.9-.11.13-
}

yields

in 2.18.2, whereas in 2.19.83, it yields

The culprit seems to be the added support for power chords: In 2.18.2, c1:5 generated a c major chord; now it only generates a power chord fifth. My guess would be that Valentin V.'s chord name cleanup in 78225bc1b386e12dc was the point when this changed.

Lukas