2017-06-14 12:34 GMT+02:00 Rutger Hofman <[email protected]>:
> Good morning list,
>
> in Berg's Violin Concerto, bar 93, there is a vertical arrow between the
> solo violin and the first violins. See attached. I am convinced this is a
> voice follower indication. This construct occurs numerous times in this
> score, as in many other works by Berg.
>
> I don't know how I can make this in Lilypond. An obvious construction (which
> appeals to me because it is 'semantically correct') would be a separate
> invisible voice and a 0-length starter note like:
>
>    ... g4*0 \once \showStaffSwitch \change Staff = mvtIvlnI g8 ...
>
> and the arrow can be obtained by \override
> VoiceFollower.bound-details.right.arrow = ##t (found on the web, although I
> couldn't locate the specs for bound-details.right in the docs).
> But this doesn't work. It gives me some warnings about 'adding note head to
> incompatible stem' and doesn't display the voice follower.
>
> Making some time distance between start and end note of the voice follower
> of course works, but then the arrow is not vertical, which is obviously
> Berg's intent.
>
> I also tried cross-staff glissando, but again to no avail.
>
> Is there any other way to achieve this voice follower? Can I force the angle
> of the follower line? Or should I try to abuse glissando, for instance?
>
> Obviously, an arrow can be drawn in markup, but that is not really portable.
> Its length would be fixed, and need to be retuned for each different
> situation, or score/parts, or whatever. I would love to stay away from that.
>
> Rutger Hofman
> Amsterdam

Probably use GridLine

Here
http://lists.gnu.org/archive/html/lilypond-user/2017-04/msg00375.html
I tweaked the stencil to put out parentheses, arrows should be far easier.
Not yet tested, though.

Cheers,
  Harm

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