tremolo

[Stefan Thomas]

Dear Lilypondusers,
I have a special problem with tremolo. What could be the reason, that
the below quoted file looks so strange?

\version "2.10.10"
upper =  \relative c'
 {
\clef treble
\key c \major
\time 4/4
<e c >1^\markup { Grundgeruest, Textstelle:  ''Er schwur mit tausend
Eiden'' }  <f c > <g d > \break
<< {e'2.^\markup {dasselbe, verziert mit chromatischen Durchgaengen}
c4 f2. e4 cis1 d4 r f2. f,4 a2. g4} \\
     {
\repeat "tremolo" 8 { <c, e,>16  e 16 }
 \repeat "tremolo" 4 { <c f, >16 f16 }
\repeat "tremolo" 4 {<cis f,>16 f16 }
\repeat "tremolo" 8 {<cis g>16 f16 }
\repeat "tremolo" 4 {<d g>16 f16 }
 \repeat "tremolo" 4 {<d gis>16 e16 }
\repeat "tremolo" 8 {<d a>16 f16 }
 \repeat "tremolo" 8 {<d b>16 f16 }
}>>
f2 e4 r \break
}


lower = \relative c {
\clef bass
\key c \major
\time 4/4
gis1 a b
gis a b~ b2. r4 g1~ g2 r
}

\score {
\new PianoStaff <<
\set PianoStaff.instrumentName = "Klavier "
\new Staff = "upper" \upper
\new Staff = "lower" \lower
>>
\layout { }
}
\header {title = "Tristan, Szene 3, Akt 1" subtitle = "Deutung
einiger harmonisch komplizierter Stellen" }
Stefan Thomas
Siebengebirgsallee 9
50939 Köln
Tel.Fax:0049(0)221/412529
mail: address@hidden