Malte, I just changed the musicglyph to the G_change and F_change. So, for a single code that could be applied to initial clefs and clef changes, it would be necessary to create such clefs as new clefs?
doubleF = {
\once \omit Staff.ClefModifier
\once \override Staff.Clef.layer = -1
\once \override Staff.Clef.stencil = #ly:text-interface::print
\once \override Staff.Clef.text = \markup {
\combine \combine
\musicglyph #"clefs.F_change"
\translate #'(2.2 . 0) \with-color #white \beam #0.5 #0 #1.5
\translate #'(1.7 . 0) \musicglyph #"clefs.F_change"
}
}
doubleG = {
\once \omit Staff.ClefModifier
\once \override Staff.Clef.stencil = #ly:text-interface::print
\once \override Staff.Clef.text = \markup {
\combine \musicglyph #"clefs.G_change"
\translate #'(1.5 . 0) \musicglyph #"clefs.G_change"
}
}
tripleG = {
\once \omit Staff.ClefModifier
\once \override Staff.Clef.stencil = #ly:text-interface::print
\once \override Staff.Clef.text = \markup {
\combine \combine
\musicglyph #"clefs.G_change"
\translate #'(1.5 . 0) \musicglyph #"clefs.G_change"
\translate #'(3 . 0) \musicglyph #"clefs.G_change"
}
}