Re: trouble changing notehead size on percussion staff

[Mats Bengtsson]

Try to set the property on Thread.NoteHead instead of Voice.NoteHead.
The reason is probably that the drums->paper function changes some
NoteHead property only within the current Thread context, which means
that a separate copy of the list of properties for the NoteHead is made for
that context so the changes you do later in the Voice context are not seen.
This is an intricate detail of the property setting mechanism that I didn't
realize until very recently even though I've used LilyPond for several 
years.

  /Mats

Niki Pantelias wrote:

> Hello,
>
>  The .ly file pasted in below demonstrates a problem I'm having with 
> changing notehead sizes in a drum part.  When I run it as shown, the 
> changes to font-relative-size have no effect, which seems to me to be 
> a bug.
>
>  If I comment out the line
>  \apply #(drums->paper 'drums)
> the notehead size _does_ change, although of course the result looks 
> nothing like a drum part :-)
>
>  thanks,
>  -- Niki
>
> ------------
> \include "english.ly"
>
> papersize = "letter"
> \include "paper20.ly"
>
> \include "drumpitch-init.ly"
> Scale =
>  \context Voice
>  \notes
>  {
>    \time 4/4
>    bd4 tomfl
>    \property Voice.NoteHead \override #'font-relative-size = #-3
>    tomfh tomml | tommh
>    \property Voice.NoteHead \revert #'font-relative-size
>    sn hh cymr |
>    \bar"|."
>  }
>
> \include "english.ly"
>
> \score {
>  \apply #(drums->paper 'drums)
>  \new Staff {
>    \clef percussion
>    \Scale
>     }
> \paper { papersize = "letter"
>           linewidth = \hsize - 0.9 \in }
> }
>
>
>
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