Hey Dan,
thanks for this quick help, the result looks pretty decent. My problem was, that i didn’t know that i can use the expression selector on “by character”. So now i am going to add a second variable for the amplitude of the sine.
The tips from Kevin also look pretty interesting, because this will drive the sine “per pixel” not “per char”, i will try out this also and give feedback, thanks to you both and have a nice weekend!