Re: I want ledger lines in middle of staff, or dashed staff lines

I don't see any need for a separate class. It should be enough to add a property setting that allows for ledger lines within the extent of the stave. I hope you use the \override Staff.StaffSymbol #'line-positions = ... feature (see http://lilypond.org/doc/v2.8/Documentation/topdocs/NEWS) to cre

Re: I want ledger lines in middle of staff, or dashed staff lines

Thanks. I'm starting to go with some C++ hacking. I can get the extra ledger lines as long as I don't need them, when the note is outside of the staff and normal ledger lines are created, as you mentioned. I haven't yet lied to LilyPond about whether the note is outside the staff, but I'll think

Re: I want ledger lines in middle of staff, or dashed staff lines

As far as I can see from the implementation, the ledger lines are only typeset if the note pitch is outside the staff, so some C++ hacking would be needed to get a clean solution for you. It should be possible to fool LilyPond, though, by typesetting the note heads one octave too high (for example

I want ledger lines in middle of staff, or dashed staff lines

I want to introduce ledger lines in the middle of a staff which has some missing lines. Alternatively, I could using dashed or dotted lines in these locations. I'm working on chromatic staffs, using 6-6 Tetragram by Richard Parncutt as a starting point. http://web.syr.edu/~pwmorris/mnma/gallery