[sciurius]

Oh dear, you seem to have a very dim view of my programming skills ;-)  However you can set your fears to rest; my code easily handles this, e.g. https://github.com/aspiers/PDFexploder/b...ion.rb#L25 - and any other implementation would find it easy to do the same.

I trust your code doesn't crash. Neither does mine .

But my objection is that using only a starting page may not be sufficiently deterministic under all circumstances.
Given the example in my posting, you would need to collect all song data and sort on page number to be sure.

Also:

"5-" would mean page 5 and all subsequent pages until the next page not claimed by any other song

The usual interpretation (e.g., LaTeX): If you specify a range consisting of a hyphen (or any tie) but with one or two empty page numbers, the following will happen:

1. a range of the form -34 is taken to mean pages 1 to 34;
2. a range of the form 12- is taken to mean page 12 to last page;
3. a range of the form - (only hyphen) is taken to mean page 1 to last page.