aleatoric

[Neuro]

Dear list,


How do I write aleatoric music in Lilypond?

Actually, I am writing a woodwind quintet, intending to have two group for 
aleatoric:
"Horn & bassoon" is one group playing thythmically together, while f"lute, 
clarinet, and oboe" is another group playing thythmically together;
yet each of these two groups plays rhythmically independently.

How do I achieve that in lilypond (2.10.20) - for printing the music out? --  
that is, I am not worrring about the midi files for now.



Thank you very much

neuro