Extracting simultanuous notes from lilypond

[Dirk De Becker]

Hello all,

For my Artificial Intelligence graduating project, I'm working on an 
"Intelligent Partiture Reduction System". Starting from a partiture for 
several instruments, I try to reduce it to a partiture for e.g. piano 
and flute (using AI methods and a computer of course).
For the representation of the partitures, we chose lilypond. In order to 
perform any processing on a partiture, it is of course necessary to 
have, for all time instances, the set of notes that are played 
simultanuously. I suppose something like that should already be done 
internally in lilypond, in order to put all simultanuous notes nicely on 
a vertical line. So I started browsing the code. But since I'm not 
familiar with the stucture of lilypond's code, and since there is not 
that much of comments inside the code, this is not a trivial task. (If 
there is some place where I can find documentation about the code's 
structure or something, please let me know).	
So, if anyone could give me any clues of where I can find, for a given 
moment in time, al simultanuous notes, I would be very gratefull.

Dirk

PS: If we find a system that works fine (which we surely hope to) it 
will most probable be released under the same licensing conditions as 
lilypond itself.

--
Dirk De Becker
Waversebaan 90
3001 Heverlee
016/23.36.65
address@hidden