Thanks Jean. This is indeed a beginning.
However, you have to change the positions each time the notes change.
And and if you want to shorten the beams, it becomes really very
tedious (see below)! Could it be possible to specify vertical AND
horizontal positions relative to notes rather than staff?
Philippe Auclair
Well, this time you'll need help from other people as
this exceeds my capabilities. Just for reference, the
weird tremolo placement is a known issue:
https://gitlab.com/lilypond/lilypond/-/issues/318
Best,
Jean
