--- /dev/null
+\version "2.14.2"
+
+\header {
+ texidoc = "
+To calculate the total duration of chord tremolos, only real notes shall be
+counted, no other commands.
+"
+}
+
+right = \relative c'' {
+ s2
+}
+
+left = \relative c' {
+ % This tremolo contains just two notes (but three lilypond events/commands!)
+ \repeat tremolo 4 { f,16 \change Staff = "right" f'}
+}
+
+\score {
+ \new PianoStaff <<
+ \new Staff = "right" { \right }
+ \new Staff = "left" { \clef bass \left }
+ >>
+}