Cross-staff chords

[Reinhold Kainhofer]

Hi,
For the musicxml2ly application, I'm looking into how to convert cross-staff 
chords in PianoStaves (i.e. chords that have some notes in the upper and some 
in the lower staff). The documentation talks about these in 
http://lilypond.org/doc/v2.11/Documentation/user/lilypond/Cross-staff-stems#Cross-staff-stems

However, this approach is not possible for me in musicxml2ly (apart from the 
fact, that I think that this is a terribly hackish workaround, but no proper 
way), because I'm already inside a voice and can't easily created another 
voice. The other issues I have with that workaround are that
 - the stem length is not known at all (sometimes 20 might be required, 
sometimes only 10 and 20 would look awkward), so i can't automate this 
setting
 - The no-flag does not work at all for beamed chords

I'm attaching a sample which displays these problems.

In short, as this is no option for me, is there any other / better way to 
split a chord upon two staves and produce the result as shown in the attached 
file 14c-StaffChange-Finale-Ref.pdf (created in Finale)?

Cheers,
Reinhold

-- 
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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/

14c-StaffChange-Finale-Ref.pdf
Description: Adobe PDF document

cross_staff_chords.ly
Description: Text document

cross_staff_chords.pdf
Description: Adobe PDF document