Thank you all, for your reactions. Great support!! I checked the solutions you have send. Maybe readers in future want to know my findings for their own use. - All of them are functional, and useful. But not the same 😉
Mark send this one: https://lsr.di.unimi.it/LSR/Snippet?id=346 defineTransform And this one seems (at the end) the most usefull for me. Is constructed like a lilypondcommand. It is possible to change rhythms + notes. Part of it is a \transpose command (it cannot be omitted). I did not discover the function of it (in this command), but it does not hinder. Robin has send two: The following one was most close 1. https://lsr.di.unimi.it/LSR/Snippet?id=465 Very usefull to change the rhythmic pattern. I could not see how to use this for changing to different chords. Thimoty send a version using \ShiftDuration. Very strong command, but it does not change the number/order or notes played. (I had to place 3 quarts instead of 6 eights. That did not work, the results was 6 notes spread over two bars). Matts gives a nice approach to create your own scheme function. The functionality is about the same as the \defineTransform command. But I would have to “recreate” the command every time I need it. For my, as said, the defineTransform was the most fast solution.
