Single-staff polyphony

[Richard Opheim]

It's my belief that the following code should have produced a 16-bar single-staff polyphony, but instead, the second voice follows the first voice consecutively and I get 32 bars.

 

\version "2.12.3"
\header {subtitle = "Single staff polyphony (but only measure 8 has more than one voice at a time)"}
\score {
\new Staff {
\new Voice = "leader" {\relative e' {\time 6/8
\partial 4. e8 e4
e8 e4 e8 e4
d4. e4 c8 ~
c4. s4.
s2.
s2.
s2.
s2.
s4. e8 d4
e4 a8 ~ a8 e4
d4. e4 c8 ~
c4 s2
s2.
s2.
s2.
s2.
s2. }
\new Voice = "chorus" {\relative d' {
\partial 4. s4.
s2.
s2.
s4. r8 d4
d4. d4.
c8 g4 g8 b4
a4. b8 a4
g4. r8 a4
a4. a4.
s2.
s2.
s4 d8 ~ d8 d4
d4. d4.
c4 g8 ~ g8 b4
a4. b8 a4
g4 a8 ~ a8 a4
a4. a4. \bar "|."}}}}
\layout{}
\midi{}}

What's wrong?

 

Richard Opheim