more ossia

[David Bobroff]

Thanks, Trevor for tweaking my code so the lyrics line up.  I'm still at 
a loss to understand why that is, but that can wait.

In looking at the result of my struggles with ossias I have concluded 
that I want something a bit different from what I'm getting now.  The 
ossia sections in this score are long enough that, without clefs and key 
signatures, they look odd.  I've been studying the section on ossias in 
1.6.2 (v2.12.3) of the Notation Manual.  There is an example which uses 
\RemoveEmptyStaffContext.  This looks promising but I'm wondering if 
this can be used with a "layering" approach.  That is, is it possible to 
contain all the ossia passages in a single ossia = {...} and combine it 
with the main line inside << >>.  For display I want the clefs/key sigs 
to appear at the start of the ossia line.  I see that using 
\RemoveEmptyStaffContext is "most convenient" when the ossia line begins 
at a line break.  I suppose I could simply force a line break where 
these passages begin which would/should give me the clefs and keys at 
the start of the ossia passage (although it would be nice if I could let 
Lily decide the line breaks and have the clef/key show up at the 
beginning of the ossia without a floating clef at the left end of the 
line).  On the other hand, by using \RemoveEmptyStaffContext am I 
constrained to adding the ossia passages within the main line as it is 
done in the example in the docs?

Thanks,

David