Harp lever changes

[Helge Kruse]

Hello,

I want to write a score for the lever harp. To indicate a pedal change 
you can write the new pedal position as note names as described in NR 
"2.2.4 Harp". While the pedal changes the pitch of all octaves you have 
to set the levers for each individual string. This is indicated within 
the staff.

To indicate that this notes are not part of the melody, it is surrounded 
by a rectangle and sometimes by a different head shape. This is a but 
complicated  since this rectangle should
- have it's own place (no notes or rest above or below it)
- ignored in any beat calculation, since it does not sound at all

The attached examples show only one note per rectangle but are from a 
usual score.

Do you see a way to achieve this requirements with Lilypond?

Here is a examples that does NOT work.

This generates the notes (still without the rectangle) but they take 
space. The last G should be in the second measure.


noHead = {

   \once \override Stem #'stencil = ##f

   \once \override Beam #'stencil = ##f
   \once \override NoteHead #'style = #'harmonic

}

\score {

   \new Staff

   \relative c' { c4 d e f \noHead <dis dis'> e8 a dis!4 dis'!  g, }

   \layout { }

}




Regards,
Helge

2.png
Description: PNG image

1.png
Description: PNG image

4.png
Description: PNG image

3.png
Description: PNG image