polychords, using root in chord markup?

[Jean-Alexis Montignies]

Hi,

I will have to write polychords (as my jazz harmony classes is getting to that) in Lilypond. I'm looking for ways to do this. Polychord - Wikipedia, the free encyclopedia

Is it be possible to use the root or a transposed root into the markup of a chord? I could then use the extensions to recognize a upper chord relatively to the root.

Another work around could be the use of a second line of chord, but then how to the horizontal lines between the two chords?

Suggestions? Could I rewrite some chord naming scheme function to do that?

Greetings,

Jean-Alexis

PS: I'm currently really annoyed by bug 1700 ;)