On Fri, 15 Jun 2018 at 15:00, Aaron Hill wrote:
> On 2018-06-15 05:27, Gianmaria Lari wrote:
> > \version "2.19.81"
> > #(define Ez_numbers_engraver
> >(make-engraver
> > (acknowledgers
> > ((note-head-interface engraver grob source-engraver)
> > (let* ((context (ly:translator-context engraver))
> > (tonic-pitch (ly:context-property context 'tonic))
> > (tonic-name (ly:pitch-notename tonic-pitch))
> > (grob-pitch
> > (ly:event-property (event-cause grob) 'pitch))
> > (grob-name (ly:pitch-notename grob-pitch))
> > (delta (modulo (- grob-name tonic-name) 7))
> > (note-names
> > (make-vector 7 (number->string (1+ delta)
> > (ly:grob-set-property! grob 'note-names note-names))
> >
> > \layout {
> > ragged-right = ##t
> > \context {
> > \Voice
> > \consists \Ez_numbers_engraver
> > }
> > }
> >
> > \new RhythmicStaff { a4 b8 a }
> >
> > and this is the error I get
> >
> > Interpreting music..document.ly:8:26 <0>: In procedure
> > ly:pitch-notename in
> > expression (ly:pitch-notename tonic-pitch):
> >
> > ..document.ly:8:26 <1>: Wrong type argument in position 1 (expecting
> > Pitch): ()
> >
> >
> > Any suggestion to fix it?
>
> It appears that RhythmicStaves do not have a tonic property. So there
> is no reference from which you can derive the numbering. You can
> explicitly specify a tonic:
>
>
>\new RhythmicStaff \with { tonic = #(ly:make-pitch 0 0 0) }
> { \easyHeadsOn a4 b8 a }
>
Aaron, that's great!
Thank you!!
g.
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