Re: hairpins default stop at barline

[Simon Albrecht]

Am 14.06.2015 um 01:29 schrieb Gianmaria Lari:
> First, I'm not a politician and I'm not here to win a war :) My suggestion is
> just a suggestion that have to be analyzed and in case it brings more
> benefits than disavantages it should be considered; if an expert explains me
> it is not advantageous I will not cry and I will be glad having learnt
> something new.
>
> Now regarding the issue, I suspect I have not been clear.
>
> Attached is the snapshot of Pratch study #11
>
> <http://lilypond.1069038.n5.nabble.com/file/n177817/Capture.png>
>
> As you can see in the snapshot, hairpin begin on 'd8'  and end on "f4."
> Could you please confirm me that in music language this means crescendo ends
> on 'f4.' (d8' has the lower intensity and 'f4' the higher)
Well, very strictly I would interpret this crescendo to end even 
somewhat after the downbeat. However, one can also see that the drawing 
is somewhat sloppy, so yes, I can confirm that. As a sidenote: You’ll 
find that there are many music publications with typographical errors in 
them, even most annoying ones, and often it’s better to follow that 
which Lilypond does.
> And if this is the case, why this code
>
> d4. e8\< (fis8 g8)
> a4. b8 (a8 g8)
> fis4\! a8 (fis8 d8)
>
> does not work as written and I have to add 'override Hair....."?
It does work as written, only there are two major conventions on how to 
represent a crescendo which ends on the beat directly after a barline. 
Lilypond follows that which ends the hairpin before the barline, but 
nevertheless is meaning the same: a crescendo until the following beat. 
And because the other convention (continuing the hairpin up to the note 
after the barline) is quite widely used and much preferable in some 
cases, a _very simple_ way to change the behaviour was introduced. Note 
that you need the override only once, if you want it in every instance; even
\layout {
  \context {
    \Voice
    \override Hairpin.to-barline = ##f
  }
}
will then make sense. Or, if it’s only for specific instances, you can 
use { ceses128-\tweak to-barline ##f \< }, or store the tweak and \< in 
a variable like
hairpinLong = -\tweak to-barline ##f \<
Now, that’s a bouquet to choose from!

Yours, Simon