RE: error

[Erik Appeldoorn]

Thanks Reinhold,

As I wanted the hairpins and the forte afterwards for me the output is not
erroneous. Indeed the error-wording does suggest a music-coding error where
in fact there might be none.

I'm not into changing source code, someone else will have to figure that one
out.

Keep well, Erik

> -----Original Message-----
> From: address@hidden [mailto:lilypond-
> address@hidden On Behalf Of Reinhold Kainhofer
> Sent: woensdag 4 november 2009 1:06
> To: address@hidden
> Subject: Re: error
> 
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> Am Dienstag, 3. November 2009 21:33:51 schrieb Erik Appeldoorn:
> > Did I understand correctly that hairpins and (de)crescendo's
> automatically
> > end on a volume specifier?
> >
> > Like c\< d e f g\f, where the crescendo ends on (or just before) the g
> with
> > the forte. I shouldn't have to end them with an \!
> >
> > I get errors: (de)crescendo on items with specified volume.
> 
> This has nothing to do with the implicit \!
> The problem appears when the volume before and after a (de)crescendo is
> the
> same (typically because of an implicit decrescendo, which is not notated),
> so
> lilypond does not know how to handle the crescendo.
> 
> I'm able to reproduce that warning with the following code:
> 
> \version "2.13.7"
> \score {
>  \new Staff \relative c'{
>    c\f d e f
>    c\< d e f\!\f
>   }
>   \midi {}
> }
> 
> Note that the volume is already \f, and then another crescendo starts and
> ends
> with \f, too. Typically, some parts after the first \f would be played a
> little less forte, so the crescendo makes sense.
> 
> Granted, that warning message has extremly  bad wording, and it does not
> tell
> you at all where in the problem is! I have not checked, whether the
> location
> can be included in the warning, which would be quite an improvement.
> 
> AFAICS, that warning is triggered in the function
> Audio_span_dynamic::render(), so it happens after parsing. And the code is
> structured so that all superfluous dynamics are discarded. The message is
> then
> printed if no dynamics changes are left for the crescendo. First, I have
> no
> idea if it is even possible to get the position in the code at that time,
> even
> if the dynamic object is still available... And second, one would have to
> restructure the code a little bit to keep the discarded dynamics around,
> from
> which one might possibly get the position in the code.
> 
> Cheers,
> Reinhold
> - --
> - ------------------------------------------------------------------
> Reinhold Kainhofer, address@hidden, http://reinhold.kainhofer.com/
>  * Financial & Actuarial Math., Vienna Univ. of Technology, Austria
>  * http://www.fam.tuwien.ac.at/, DVR: 0005886
>  * LilyPond, Music typesetting, http://www.lilypond.org
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