making sense of templates in manual

[Markian Hlynka]

Ok, I'm looking at templates in the manual, 3.2.2, and 3.2.3.

rather than reprint, you can see it here:

http://lilypond.org/doc/v2.6/Documentation/user/out-www/lilypond/Piano-templates.html#Piano-templates

The first one (3.2.2) makes perfect sense to me:

it has \score, and within that it has a voice, and then a pianostaff in the form

        \context PianoStaff <<

           \context Staff = upper \upper

           \context Staff = lower \lower

        >>

That makes sense. Now, 3.2.3 says it will remove the separate vocal line. I would expect it to look something like

        \context PianoStaff <<

           \context Staff = upper \upper

           \lyricsto upper \new Lyrics \text

           \context Staff = lower \lower

        >>

or something like that. Instead, you see, in part,

         \context Staff = upper {

             \context Voice = singer \upper }

         \lyricsto "singer" \new Lyrics \text

What really confuses me is that the lower staff is now within its own << >>, whereas the upper staff has none of these, only { } . But not entirely! the \lyricsto section is outside of the upper staff context's { } !! So, it appears to me that the upper staff has no syntactic bound!

Why doesn't the upper voice need << >> ?! This seems counter-intuitive to me. Or, if it is intuitive, can someone please explain how?

Thanks,

Markian

----

Early to bed and early to rise, makes a man stupid and blind in the eyes.

                                                     --Mazer Rackham