I feel we're constantly updating a
'messy' chapter that doesn't really
follow many of the CG guidelines and
so could be better organized.
Apart from some @cindex or @seealso
references no new information and
nothing technical has been removed
but the information has been
reorganized so that it is (I hope)
grouped more logically.
Some snippets have been created from
the original text as they were
inappropriate for the NR.
The @lilypond examples have been simplified
and turned into @examples instead as the
engraving output is largely irrelevant
in a section about MIDI; saving space.