partcombine, but including rests in quiet voices?

[Reinhold Kainhofer]

Hi,
I'm typesetting large choir pieces, and some orchestral instruments should be 
combined in the full score into one staff. However, when one of the two 
instruments (e.g. first and second hornets) is quiet, I don't want the "Solo 
I" or "Solo II" written above, but rather real rests printed. An example is 
attached (plus my attempts in lilypond, which do not show the rest in the 
second measure).
 As you can see, it's almost the same as with partcombine, except that with 
partcombine, there can never be a rest and a note in parallel, which is 
exactly what I want.

So, is there a way to prevent partcombine from swallowing rests?

Cheers,
Reinhold
-- 
------------------------------------------------------------------
Reinhold Kainhofer, Vienna University of Technology, Austria
email: address@hidden, http://reinhold.kainhofer.com/
 * Financial and Actuarial Mathematics, TU Wien, http://www.fam.tuwien.ac.at/
 * K Desktop Environment, http://www.kde.org, KOrganizer maintainer
 * Chorvereinigung "Jung-Wien", http://www.jung-wien.at/

partcombinen_with_rests.jpg
Description: JPEG image

partcombine_rests.ly
Description: Text document

partcombine_rests.pdf
Description: Adobe PDF document