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

From: Lukas-Fabian Moser
Subject: Re: polychords: what's the current state-of-the-art?
Date: Tue, 9 Aug 2022 12:28:25 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0

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 <> 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 {


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.


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