Beam.positions affecting space between staves

[Karim Haddad]

Hi

I know there is a simple solution for this but cannot find it.

When applying \override Beam.positions in order to raise the beam of a grouped 
rythm above the first staff:

1) it doesn't overlapp the first staff
2) an extra space is created (i imagine to avoid collision)

How can i make it happen.

Here is the code:

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
\version "2.25.1"
 
"one"=
{
\time 4/4
s2
c'4 
c'4
|
} 
 

"two"=
{
\time 4/4
\once \override Beam.positions=#'( 18 . 18)
c'8 [
c'8
c'8
c'8]
c'4
c'4
|
} 
 
\score { 
 { 
<<
\new StaffGroup
 << 

\new Staff  {
\one
}

\new Staff  {
\two
}
 >> 
>> 
}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

in image one is the result
image two is what i want


thank you for any solution.
BEst


-- 
Karim Haddad

Music Representations Team, IRCAM
Research and development manager.

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