Re: Adjustment to tablature output

[Choan Gálvez]

On 5/9/12 09:34 , Christopher Webster wrote:
> > From: Choan Gálvez
> > Subject: Re: Adjustment to tablature output
> > Date: Wed, 09 May 2012 01:23:26 +0200
> > User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5; rv:12.0)
> > Gecko/20120428 Thunderbird/12.0.1
> > On 5/8/12 10:48 , Christopher Webster wrote:
> > Is there a recommended way of adjusting TabStaff output so that the
> > note-heads (fret indications) appear _above_ rather than _on_ the lines
> > representing the strings, please? This would make it more closely
> > resemble English renaissance lute tablature, and I have a particular
> > piece of transcription for which that is a desirable goal.
> >
> > I've got as far as guessing that assigning a non-standard procedure
> > value as the tabStaffLineLayoutFunction property of
> > Tab_note_heads_engraver would probably get me towards where I want to
> > be, but alas I'm too stupid and/or too ill-informed to see how to write
> > such a procedure.
> >
> > Shouldn't be that difficult. Check this thread:
> > <http://comments.gmane.org/gmane.comp.gnu.lilypond.general/57580>. By
> > adjusting the `TabNoteHead #'extra-offset` you can put the letters
> > above the lines.
> >
> > Unfortunately, they won't align that nicely... but I can't help any
> > further.
> >
> > Best.
> > --
> > Choan Gálvez
> >
> > Ukecosas. Los ukeleles que nos gustan, también para ti
> > Visítanos: <http://ukecosas.es/>
> > Degústanos en Facebook: <http://facebook.com/ukecosas>
>
> Many thanks for the advice and the link.
>
> In the meantime, I searched this list's archives more carefully and
> found a solution which works perfectly.
>
> Posted by Neil Puttock on Fri, 8 Apr 2011 20:40:16 +0100 and archived at
> http://lists.gnu.org/archive/html/lilypond-user/2011-04/msg00187.html :
>
> > \override TabNoteHead #'Y-offset =
> > #(lambda (grob)
> > (+ (/ (ly:staff-symbol-staff-space grob) 2)
> > (ly:staff-symbol-referencer::callback grob)))
> > \override TabNoteHead #'whiteout = ##f
>
> What wasn't immediately obvious to me was where to insert that fragment,
> but I got lucky at the first attempt by putting it inside the \with
> construct for my TabStaff :
>
> \new TabStaff
> \with
> {
> tablatureFormat = #fret-letter-tablature-format
> fretLabels = #luteFretLabels % defined elsewhere by me
> stringTunings = #bandoraTuningSet % defined elsewhere by me
> \override TabNoteHead #'Y-offset =
> #(lambda (grob)
> (+ (/ (ly:staff-symbol-staff-space grob) 2)
> (ly:staff-symbol-referencer::callback grob)))
> \override TabNoteHead #'whiteout = ##f
> \remove "Clef_engraver"
> \remove "Time_signature_engraver"
> }
> {
> % stuff ...
> }

Nice. But... it still results in the same ugly (to me) vertical 
alignments: letters with ascendant strokes look nice, letters with 
descendant strokes are aligned by its bottom, letters without ascendants 
or descendants leave a gap between its bottom and the line. See attachment.

% simplified example
\version "2.14.2"
\new TabStaff
  \with
  {
    tablatureFormat = #fret-letter-tablature-format
    \override TabNoteHead #'Y-offset =
      #(lambda (grob)
        (+ (/ (ly:staff-symbol-staff-space grob) 2)
          (ly:staff-symbol-referencer::callback grob)))
    \override TabNoteHead #'whiteout = ##f
  }
  {
    e' f' fis' g' gis' a' ais' b' c'' cis'' d'' dis'' e'' f'' fis'' g'' 
gis''
  }
% end example

Best.
--
Choan Gálvez

tab_letters_above_line.pdf
Description: Adobe PDF document