DynamicLineSpanner Vertical Centering

[Dave Higgins]

I'm having a little trouble understanding the DynamicLineSpacing property.

I'm trying to get the dynamic to show in the middle of the staff.  I have moved 
the \property about and haven't had any luck.

Where does the \property line go and how is it supposed to work.  I am trying to 
get the dynamic to meet in the middle between the two sections 'primoright' and 
'primoleft'.

Any help would be appreciated.

Currently, my file looks like this . . .

primoright = \notes\relative c {
        \clef treble
        \key d \major
        \repeat "volta" 2 {
        \property Voice.DynamicLineSpanner \override #'self-alignment-Y = #0
                < d''8\f fis a d > [ fis16( g ] [ a g fis e ] ) d8 r r4 |
                etc.
}

primoleft = \notes\relative c {
        \clef treble
        \key d \major
                < d'4\f fis a > r r8 fis16 ( g a g fis e |
                etc.
}

primo = <
        \context Staff = staffpa \primoright
        \context Staff = staffpb \primoleft
>

\score {
        <
        \context PianoStaff \primo
        \context PianoStaff \secondo
        >
}

Thanks,
--
Dave Higgins
Littleton, Colorado
address@hidden
--
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