i have excerpted the code from your example as
\version "2.12"
fng = #(define-music-function (parser location marktext) (string?)
#{ \markup {\finger $marktext } #})
{ < c' d'>4^\fng #"2\n1" }
but running it gives following errors:
Analysieren...
test.ly:5:12: Fehler: syntax error, unexpected MUSIC_FUNCTION
{ < c' d'>4^
\fng #"2\n1" }
<string>:1:33: Fehler: syntax error, unexpected \markup
parseStringResult = \notemode {
\markup {\finger \lilyvartmpb }
<string>:1:42: Fehler: Ungültige Fluchtsequenz: »\finger«
parseStringResult = \notemode { \markup {
\finger \lilyvartmpb }
test.ly:5:0: Fehler: Fehler gefunden, musikalischer Ausdruck wird ignoriert
{ < c' d'>4^\fng #"2\n1" }
what am i missisng?
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