Midi output vs. paper output

[Randall J Elzinga]

Hello lilypond users,

I have recently installed the windows version of lilypond.  I have a couple 
of questions that I cannot find answers to in the available documentation.

Is there a way to have repeats unfolded in midi output, but not unfolded in 
the paper output (other than running lilypond twice, once for the midi, and 
once, after altering the document, for the paper)?

Also, when I choose to output only midi, the lilypond complains about the 
lack of a document to make pdf from.  Is this a bug or a feature?

Randy.