Re: cross staff slur

[Simon Albrecht]

Hi Ming,

On 20.09.2016 14:32, MING TSANG wrote:
hi, lilyponders:
I have difficulty to generate the following by lilypond v2.19.47
1.  in clef bass bar2  I cannot generate " f'2. "-- it warns bar 
check, i can only make it " f'2 "

You need parallel music expressions.

2.  in clef bass bar3  I don't know how to code the " d'4 "   -- why 
produces cross staff beam?

The d' also requires a parallel music expression; the cross staff beam 
is produced because in 4/4, eigth notes are normally beamed by half bar. 
If you really don’t want the beam, you can either use manual beaming [] 
or adjust automatic behaviour by \set Timing.beamExceptions = #'() or by 
adjusting the default for 4/4 with \overrideTimeSignatureSettings. This 
is described in NR 1.2.4, ‘Setting automatic beam behavior’.

3.  starting slur is too high bar 2

Try \shape.

HTH, Simon
\version "2.19.47"
\language "english"
expandVar =
#(define-music-function (xx start stop) (list? index? index?)
   #{ #@(map (lambda (i) #{ $xx . #i #}) (iota (- stop start -1) start)) #})


#(set-global-staff-size 18.0)

\header {
  title = "無盡感恩"
  subtitle = "Forever Thanks"
  composer = "曲詞 : 鄭鎧賢"
  arranger = "编 : 余遠淳"
}

\layout {
  \context {
    \Voice
    \consists "Melody_engraver"
    \override Stem #'neutral-direction = #'()
  }
}

global = {
  \key ef \major
  \numericTimeSignature
  \time 4/4
  \partial 4
  \tempo "Andante" 4=86
}



rht.116 = { bf''8 g'' |\break }

rht.117 = { \time 2/4 <c'f'c''>2 | }
rht.118 = { \time 4/4 r4 s2. }
rht.119 = { r4 s2. | }
rht.120 = { <bf'ef''>2 <c''ef''f''> | }
rht.121 = { s1 | }
rht.122 = { s1 | }
right =  {
  \global
  \expandVar \rht 116 122
}

lft.116 = { r4 | }
lft.117 = { \time 2/4 <bf,af>2 | }
lft.118 = <<
  { \time 4/4 s4 f'2. | }
  \new Voice { ef8( bf \change Staff = right r8 g'8 <b' f''>2) | }
>>
lft.119 = <<
  { s4 d' <a ef'>2 }
  \new Voice { c8( g \change Staff = right g'8 c'' <f'' c'' g'>2) }
>>
lft.120 = { <bf ef'g'>2 <bf af'> |}
lft.121 = { ef,16( bf, ef f g bf ef' f' \change Staff = right g'16 bf' ef'' f'' g'' bf'' ef''' f''' |  }
lft.122 = { g'''1\fermata) |}
left =  {
  \global
  \expandVar \lft 116 122
}



pianoPart = \new PianoStaff \with {
  instrumentName = "Piano"
} <<
  \new Staff = "right" \with {
    midiInstrument = "acoustic grand"
  } \right
  \new Staff = "left" \with {
    midiInstrument = "acoustic grand"
  } {  \clef bass  \left }
>>

\score {
  <<
    \pianoPart
  >>
  \layout { }

}

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