extracting markup texts for braille

[Maurits Lamers]

Hey all,

I also asked this question on the lilypond-user mailing list, but I 
gather it is a rather complex question for that list. As you might be 
aware, I have been working on a braille extension for Lilypond which 
(based on the music info extraction example) renders Lilypond scores 
into music braille.

While the listener system works great for extracting musical 
information, it doesn't provide any methods to extract text inserted 
outside of the music context.

In my specific case, I am trying to convert a songbook, which has the 
format of printing one verse of a song with the music notation, and with 
the remainder of the song text as \markup text blocks below the music.

Is there any way that I could extract this text in order to include it 
with the generated braille? The preferred solution should be as 
transparent as the listener system is for the musical information.

Thanks in advance!

cheers

Maurits