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how to write a scheme function to override glissando properties

 From: Patrick Schmidt Subject: how to write a scheme function to override glissando properties Date: Tue, 14 Dec 2010 14:25:31 +0100

```Hi all,

```
I noticed that glissandi are quite often hardly visible in a Staff- context. There is also a huge difference in the look of glissandi in Staff- and TabStaff-contexts. I'd like to write a function to adjust these differences for Staffs and TabStaffs separately but I don't even manage to manipulate the look in general. I'd be very grateful if someone showed me what's missing in the following code alternatives:
```
1)

slide =
#(make-music
(sequential-music
(list
(make-grob-property-set 'Glissando 'thickness 5)
(make-grob-property-set 'Glissando 'minimum-length 10)
(make-grob-property-set 'Glissando 'springs-and-rods
ly:spanner::set-spacing-rods)
(quote GlissandoEvent))))

2)

slide =
#(define-music-function (parser location) ()
#{
\once \override Glissando #'minimum-length = #10
\once \override Glissando #'thickness = #5
\once \override Glissando #'springs-and-rods =
#ly:spanner::set-spacing-rods
\glissando
#})

myMusic = \relative c' {
a4\slide b4\3
%  \override Voice.Glissando #'minimum-length = #10 %this works
```
% \override Voice.Glissando #'springs-and-rods = #ly:spanner::set- spacing-rods % this works
``` % \displayMusic { a4\glissando b4\3 }
}

\score {
<<
\new Staff {
\new Voice {
\clef "treble_8"
\myMusic
}
}
\new TabStaff {
\new TabVoice {
\myMusic
}
}
>>
}