Avoid accidentals in cadenza

[Helge Kruse]

I am trying to typeset the Fantasia (op.35) of Louis Spohr.
(http://ks.imslp.net/files/imglnks/usimg/0/01/IMSLP164842-PMLP294545-SpohrOp35edHoly.pdf)


There is a cadenza starting at page 8 (excerpt attached) with a lot of
tight notes. I would like to avoid spreading the nodes over more lines
than in the original because this would affect the flow and understanding.

I nearly managed to enter the notes. But there are accidentals in the
second lines that are not necessary. How can I avoid them?

\version "2.19.65"
\language "deutsch"

global = {
  \key es \major
  \tiny
}

staffUpper = { \change Staff="upper" }
staffLower = { \change Staff="lower" }

upper = \relative c'' {
  \global
  \cadenzaOn
  s4*7 -\tweak #'stencil #(ly:make-stencil '() '(0 . 0.1) `(0 . ,4) ) _""
  |
  s8*7
  |
  \tiny
  s4 s16
  ces,16[ es ges]
  ces[ ges es ces]
  ces'[ ges es ces]
  ces'[ ges es ces]
  ces'[ ges es ces]
  r ces[ es ges]
  ces[ ges es ces]
  s1.. s16
  \cadenzaOff
}

lower = \relative c {
  \global
  \cadenzaOn

  \clef "bass" f,8 \f [ as16 h ] d f[ as h]
  \staffUpper d f[ as h] d \stemUp f16[ as h]  d[ h as f]
  \stemDown d[ h as f] \stemNeutral
  d[ \staffLower h as f]
  % No line break here. Let's keep it like the IMSP version.
  %\bar "" \break

  f,16 \pp [ as32 h! ] d \stemUp f[ as h]
  \staffUpper d f[ as h!] d \stemUp f[ as h!]  d[ h as f]
  \stemDown d[ h! as f] \stemUp
  d[ \staffLower h as f]
  \bar "" \break

  % second line
  ges,8[ ces16 es] ges  s4 \clef treble es''4 ges ces es2.
  % No line break here. Let's keep it like the IMSP version.
  %\bar "" \break
  \clef bass

  g,,,,8[\f b16 des]            % avoid b accidental
  e[ g b  \staffUpper des]      % avoid g,b accidental
  e g[ b des] e g[ b des]       % avoid b accidental
  e[ des b g]
  es[ des b g]                  % avoid g accidental
  f[ des \staffLower b ges]
  \bar "" \break

  \cadenzaOff
}

\score {
  \new PianoStaff <<
    \new Staff = "upper" \upper
    \new Staff = "lower" { \clef bass \lower }
  >>
  \layout { }
}

In the second line all B notes are flat and in the second half of that
line all G notes are natural.

Best regards
Helge

SpohrKadenz.png
Description: PNG image