I've just stumbled on this converter from .bww to .ly:
http://www.jezra.net/projects/bwwtolily
Jon Kulp already announced this converter in -user list 3 years ago:
http://lists.gnu.org/archive/html/lilypond-user/2009-07/msg00030.html
I don't know anything about bagpipes music, but I think that it may be
added to the list in easier-editing page.
It's released with GPL v3
--
Federico
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