Re: trillspan

[Valentin Petzel]

Hello Erik,

\startTrillSpan is a post event, so you need to specify it after the note you 
want the trill to start on. You can use empty chords <> to circumvent this and 
kind of specify the span before the first note.

You still won’t get any change, as trill spans are by default outside-staff 
grobs, so Lilypond will only position them over or under a staff, but never 
within (unless we try hard by using extra-offset or hacks).

Thus if you want to have the spanner insider of the staff you need to tell 
Lilypond not to handle it as outside staff object, which can be done by setting 
the outside-staff-priority to '() or #f.

Finally the Y-offset will be measured from the center of the staff. This means 
it might useful to use the offset command instead of directly going by 
Y-offset. 
Or maybe not.

See here your amended example:

{
  \once \override TrillSpanner.outside-staff-priority = #'()
  \once \offset Y-offset #-2 TrillSpanner <>\startTrillSpan a4*5 
\stopTrillSpan }

Cheers,
Valentin

Am Mittwoch, 16. März 2022, 16:40:40 CET schrieb E Appeldoorn:
> I wanted to move a TrillSpann downwards to within the bar on the middle
> barline.
> I finaly came up with
> \once \override TrillSpanner.Y-offset = #-2 \startTrillSpan a4*5
> \stopTrillSpan
> But got an error 'unbound TrillSpannEvent' and nothing has changed.
> So how do I move that TrillSpanner southwards?
> (version 22.2.1)
> 
> Thanks.
> vriendelijke groet, Erik Appeldoorn

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