Thank you very much for your help, Yoshi. I think I have achieved what I
wanted, or at least some 95% of it. I'm annexing the file just cause; it is
not a MWE but it is an example at least.
[image: SplitAndConvergeStaffs.png]
Em seg., 30 de dez. de 2024 às 12:07, Yoshiaki Onishi <i...@yoshionishi.com>
escreveu:
> Dear Lucas,
>
> Glad I could help you!
>
> However, when I insert a bass clef on the lower bifurcated staff the notes
>> are incorrectly assigned and the clef is off.
>
>
> This happens because every time you set the clef in this circumstance,
> because the new positioning of the staff line has been defined by the
> following line:
>
> \override Staff.StaffSymbol.line-positions = #'(-9 -7 -5 -3 -1)
>
>
> You have to configure the new placement of the clef as well as where the
> middle C is located accordingly.
>
> Taking hints from the section: Selected Snippets - Tweaking clef
> properties in the Documentation
> https://lilypond.org/doc/v2.25/Documentation/notation/clef, you can
> modify the code as follows (I am replying with the only the excerpt you
> sent, with my modification):
>
> %%
> \set Staff.middleCPosition = -11
> \once \override Staff.Clef.stencil = ##f
> \startStaff
> <<
> {
> \clef bass % inserted bass clef for left hand/bass comping.
> \set Staff.clefPosition = -3
> \set Staff.middleCPosition = 1
> \set Staff.middleCClefPosition = 1
> {\repeat unfold 4 {c1 d e f} }
> }
> \new Staff \with {
> %%
>
> However, as you may well agree, if a clef changes in the middleway through
> a system, you would need to have the new clef shown. You can make the clef
> change appear by commenting or deleting the line: \once \override
> Staff.Clef.stencil = ##f ...But merely doing so with this particular code
> will place the clef **behind** the barline, turning the music with some
> unsightly situation. In order to fix that, i.e. have the clef appear
> **after** the barline, you need to override \override
> Score.BreakAlignment.break-align-orders. See below:
>
> %%
> \set Staff.middleCPosition = -11
> % \once \override Staff.Clef.stencil = ##f
> \startStaff
> <<
> \override Score.BreakAlignment.break-align-orders =
> #(make-vector 3 '(
> staff-bar
> clef
> ))
> \clef bass
> \set Staff.clefPosition = -3
> \set Staff.middleCPosition = 1
> \set Staff.middleCClefPosition = 1
> { \repeat unfold 4 {c1 d e f} }
>
> \new Staff \with {
> %%
>
> For more discussion on "clef after barline", see the following thread:
> https://lists.gnu.org/archive/html/lilypond-user/2012-02/msg00872.html
>
> All the best,
> Yoshi
>
>
> On Mon, Dec 30, 2024 at 7:40 AM Lucas Cavalcanti <lucaspi...@gmail.com>
> wrote:
>
>> Thank you, Yoshi. I've managed to achieve what I sought (two staff
>> bifurcated). However, when I insert a bass clef on the lower bifurcated
>> staff the notes are incorrectly assigned and the clef is off. I've tried
>> fixing this issue to the best of my ability (that is not much lmao) but to
>> no avail. Do you know how to fix this?
>>
>> %%
>> \set Staff.middleCPosition = -11
>> \once \override Staff.Clef.stencil = ##f
>> \startStaff
>> <<
>> {
>> \clef bass % inserted bass clef for left hand/bass comping.
>> {\repeat unfold 4 {c1 d e f} }
>> }
>> \new Staff \with {
>> %%
>>
>>
>> Em seg., 30 de dez. de 2024 às 01:40, Yoshiaki Onishi <
>> i...@yoshionishi.com> escreveu:
>>
>>> P.S. After hitting “send,” it occurred to me that the code I sent would
>>> not account music after a new system starts. The clef would appear
>>> incorrectly placed. I amended the code as below, and in this version, I
>>> tweaked the Scheme code setting so that the two clefs would not collide in
>>> the new system. It makes the bifurcated staffs have more distance, which I
>>> am very sure you can tweak as you like - - - Yoshi
>>>
>>> %%% CODE BEGINS %%%
>>> \version "2.24.4"
>>>
>>> \new Staff = "main" {
>>> c''1 d'' e'' f''
>>>
>>> \stopStaff
>>> \override Staff.StaffSymbol.line-positions = #'(-9 -7 -5 -3 -1)
>>> \set Staff.clefPosition = -7
>>> \set Staff.middleCPosition = -11
>>> \once \override Staff.Clef.stencil = ##f
>>> \startStaff
>>> <<
>>> { \repeat unfold 4 {c''1 d'' e'' f''} }
>>>
>>> \new Staff \with {
>>> \remove Time_signature_engraver
>>> alignAboveContext = "main"
>>> \magnifyStaff #2/3
>>> \override VerticalAxisGroup.default-staff-staff-spacing =
>>> #'((basic-distance . 0)
>>> (minimum-distance . 0)
>>> (padding . 0)
>>> (stretchability . 10))
>>> firstClef = ##f
>>> }
>>> { \repeat unfold 4 {c''2 c''2 d'' d'' e'' e'' f'' f'' }}
>>> >>
>>> }
>>> %%% END %%%
>>>
>>
\version "2.25.20"
%% SNIPPET %%
%%Adding indicators to staves which get split after a break
%%This snippet defines the:
%\splitStaffBarLine, convUpStaffBarLine and convDownStaffBarLine commands.
%These add arrows at a bar line, to denote that several voices sharing a staff will each continue on a staff of their own in the next system, or that voices split in this way recombine.
#(define-markup-command (arrow-at-angle layout props angle-deg length fill)
(number? number? boolean?)
(let* (
(PI-OVER-180 (/ (atan 1 1) 34))
(degrees->radians (lambda (degrees) (* degrees PI-OVER-180)))
(angle-rad (degrees->radians angle-deg))
(target-x (* length (cos angle-rad)))
(target-y (* length (sin angle-rad))))
(interpret-markup layout props
(markup
#:translate (cons (/ target-x 2) (/ target-y 2))
#:rotate angle-deg
#:translate (cons (/ length -2) 0)
#:concat (#:draw-line (cons length 0)
#:arrow-head X RIGHT fill)))))
splitStaffBarLineMarkup = \markup \with-dimensions #'(0 . 0) #'(0 . 0) {
\combine
\arrow-at-angle #45 #(sqrt 8) ##t
\arrow-at-angle #-45 #(sqrt 8) ##t
}
splitStaffBarLine = {
\once \override Staff.BarLine.stencil =
#(lambda (grob)
(ly:stencil-combine-at-edge
(ly:bar-line::print grob)
X RIGHT
(grob-interpret-markup grob splitStaffBarLineMarkup)
0))
%\break
}
convDownStaffBarLine = {
\once \override Staff.BarLine.stencil =
#(lambda (grob)
(ly:stencil-combine-at-edge
(ly:bar-line::print grob)
X RIGHT
(grob-interpret-markup grob #{
\markup\with-dimensions #'(0 . 0) #'(0 . 0) {
\translate #'(0 . -.13)\arrow-at-angle #-30 #(sqrt 30) ##t
}#})
0))
%\break
}
convUpStaffBarLine = {
\once \override Staff.BarLine.stencil =
#(lambda (grob)
(ly:stencil-combine-at-edge
(ly:bar-line::print grob)
X RIGHT
(grob-interpret-markup grob #{
\markup\with-dimensions #'(0 . 0) #'(0 . 0) {
\translate #'(0 . -3.70)\arrow-at-angle #30 #(sqrt 30) ##t
}#})
0))
%\break
}
%%
switch = { \new Staff = "switch"
\with { \RemoveAllEmptyStaves }
{ % switch staff code
c''1 d'' e'' f''
\stopStaff
\splitStaffBarLine s1
\override Staff.StaffSymbol.line-positions = #'(-11 -9 -7 -5 -3)
\set Staff.clefPosition = -9
\set Staff.middleCPosition = -13
\startStaff
<<
%% First let's create the lower staff (bass clef).
\override Score.BreakAlignment.break-align-orders =
#(make-vector 3 '(
staff-bar
clef
))
\clef bass
\set Staff.clefPosition = -5
\set Staff.middleCPosition = -1
\set Staff.middleCClefPosition = -1
{ \repeat unfold 2 {c1 d e f}
\break % breaking the line just to test the converging together.
\once \override Staff.Clef.X-extent = #'(-1 . 0)
%{ Had to use this Clef.-X because the clef was going inside
the initial left wall of the bar.%}
c1 d e f
\stopStaff \convUpStaffBarLine s1}
%% Now to create the second staff (in this case, upper staff).
{\new Staff
\with {
\remove Time_signature_engraver
alignAboveContext = "switch"
\magnifyStaff #1
\override VerticalAxisGroup.default-staff-staff-spacing =
#'((basic-distance . 3)
(minimum-distance . 4)
(padding . 0)
(stretchability . 10))
%{firstClef = ##f%} }
{ % higher staff code
\override Score.BreakAlignment.break-align-orders =
#(make-vector 3 '(
staff-bar
clef
))
\clef treble
\set Staff.clefPosition = -1
\set Staff.middleCPosition = 1
\set Staff.middleCClefPosition = 1
{ \repeat unfold 3 {c1 d e f}
\stopStaff \convDownStaffBarLine
s1}
}} % end higher staff code & variable
>>
\revert Score.BreakAlignment.break-align-orders
\revert Staff.StaffSymbol.line-positions
\startStaff
\clef treble
\relative c'' {\time 5/8 {\repeat unfold 4 {c8 b a g a}}}
\once \override Score.TimeSignature.break-visibility = #'#(#f #t #t)
} % end Switch Staff
} % end Switch variable
MelodyInUnison = { \new Staff \with { \RemoveAllEmptyStaves }
{ % MelodyInUnison staff code
\relative c'' {{\repeat unfold 2 {c1 d e f}}}
} % end of MelodyInUnison Staff
} % end of MelodyInUnison variable
music = {
\MelodyInUnison
\break
\switch
\revert Score.BreakAlignment.break-align-orders
\revert Staff.StaffSymbol.line-positions
\break
\time 4/4
\MelodyInUnison
} % end music variable
\score { \music }
