Re: Converting ly to musicxml

[Reinhold Kainhofer]

Am Sonntag 10 Juli 2011, 11:14:36 schrieb address@hidden:
> On Jul 10, 2011, at 10:56 AM, cab wrote:
> > Converting from midi to ly is possible, but ly to musicxml has never
> > been done... So my plan is to program it myself
> > I think I would do it in python as musicxml2ly is also written in python.
>
> This is something I proposed to the French users list earlier this year and
> it got a lukewarm response from the community (save several
> well-thought-out responses from Scheme and/or musicxml and/or
> accessibility enthusiasts).  I have started some sketches for this type of
> code, and it is certainly possible, especially if you do not include
> position information.  Contact me if you'd like to talk more about this
> and I'll dig up the sketches I've already done in Scheme.

I have been thinking about ly -> MusicXML conversion, too. I don't think using 
an external python application is really possible, because LilyPond allows for 
so many different input variations. You'd basically have to diplicate most/all 
of the iterator and engraver logic in scheme....

I have rather been thinking about adding MusicXML export like the MIDI export: 
Create some translator (e.g. a base class Exporter or Xporter to indicate XML, 
like Performer or Engraver) and subclasses to listen to all the different music 
events/grobs. That would probably be the most native and probably also easiest 
implementation of MusicXML export.

For example, MIDI creation is relatively simple code-wise (just look at the 
*performer.cc and the audio*.cc and midi*.cc files).

Cheers,
Reinhold

-- 
------------------------------------------------------------------
Reinhold Kainhofer, Vienna University of Technology, Austria
email: address@hidden, http://reinhold.kainhofer.com/
 * Financial and Actuarial Mathematics, TU Wien, http://www.fam.tuwien.ac.at/
 * Edition Kainhofer Music Publishing, http://www.edition-kainhofer.com/
 * LilyPond music typesetting software, http://www.lilypond.org/