Re: Tremolos between two whole notes

[Thomas Morley]

Hi Brent,

> On 4 February 2012 16:42, Neil Thornock <address@hidden> wrote:
>>
>> As far as getting the look you want, you need to use a combination of
>> Beam #'gap, Beam #'positions, Beam #'extra-offset, and NoteHead
>> #'stem-attachment.  I've gotten very nice results with those
>> overrides.  It's a pain, but it's worth avoiding the horrible default.



based on Neil's suggestion I worked out the function above. You have
to figure out the values manually. :(

Please note: If you use "2.14.2" it will sometimes produce a warning,
which I didn't manage to avoid or to suppress: "weird stem size, check
for narrow beams" (p.e. with the cross-staff-example of the test), and
you have to use other values.

With "2.15.24" it compiles clean.


\version "2.15.24"

\paper { line-width = 120 }

tweakWholeNoteTremolo =
#(define-music-function (parser location y¹off-y²off)(pair?)
#{
        \once \override Beam #'gap = #1.3
        \once \override Beam #'extra-offset = #(cons  0  (car y¹off-y²off))
        \once \override Beam #'stencil =
        #(lambda (grob)
          (let* ((pos (ly:grob-property grob 'positions)))
          (ly:grob-set-property! grob 'positions
                 (cons (car pos)  (+ (cdr pos) (cdr y¹off-y²off))))
          (ly:beam::print grob)))
#})

%--- test

\score {
        \relative c'' {
                \tweakWholeNoteTremolo #'(-3 . 1.9)
                \repeat tremolo 16  { gis32 d' }
                %\break
                
                \tweakWholeNoteTremolo #'(-3.6 . 1.7)
                \repeat tremolo 32  { <e, gis b>64 d' }
                
                \tweakWholeNoteTremolo #'(4.4 . -3.5)
                \repeat tremolo 16  { a'32 a, }
                
        }
}


\new PianoStaff <<
  \new Staff = "right" {
          \repeat tremolo 16  {
                
          \tweakWholeNoteTremolo #'(11.2 . -19)
                  e'''32
          \change Staff = "left"
                  a,,
          }
  }
  \new Staff = "left" {
          \clef bass
          s1
 }
>>


HTH,
  Harm

tremolo-test-01.png
Description: PNG image