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Re: Export to MusicXML

From: Alex Roitman
Subject: Re: Export to MusicXML
Date: Tue, 16 Oct 2018 11:13:29 -0700

Thank you Jan-Peter!  This looks really promising, and I’d love to contribute.

I’m only vaguely familiar with Scheme so I’ll probably take a bit of time to 
get my hands dirty with that.  Would it be OK to bug you with questions every 
now and then? Is this list a good place, or should I just email you privately?  
I promise I won’t abuse your kindness :-)


> On Oct 16, 2018, at 2:04 AM, Jan-Peter Voigt <address@hidden> wrote:
> Hello Alex,
> you don't have to apologize for this question! It comes up every now and
> then, but has not been answered satisfyingly yet. My answers to your
> questions are:
> 1. Yes
> 2. I wrote a rudimentary engraver-based solution last year which is
> waiting for clean-up and completion to support MEI, MusicXML, Humdrum,
> LilyPond (!) and any other format for which an export-module with a
> defined API exists.
> The code in the project is able to export a MusicXML-File for a simple
> lilypond-score. The resulting files are not always correct/functional so
> this is more sketch of the idea. The base is an engraver that fetches
> and collects events and on score-finalization calls the specified export
> module with this (normalized) music collection.
> The collection is some scheme-structure, but should probably be better a
> normal LilyPond music-expression.
> Just a little piece of something ;-)
> Jan-Peter
> Am 16.10.2018 um 06:49 schrieb Alex Roitman:
>> Hello,
>> I apologize in advance if this was already asked and answered on this list.  
>> I’m looking into exporting some of my lilypond music into the MusicXML 
>> format. All I could find so far was the python-ly package that attempts to 
>> translate ly files into MusicXML.  It has some issues that could be fixed, 
>> and some that I don’t think could be so easily fixed, e.g. whether or not to 
>> place accidentals, beams, and so on.
>> It seems to me that the nature of the MusicXML format is such that in can 
>> only be correctly written when the music is interpreted in context.  Which 
>> is what lilypond does.  So I’m guessing that the right way to go about this 
>> is to create a new Translator, alongside Performer and Engraver, that 
>> instead of midi/graphical objects just dumps XML.
>> Finally, here are my questions:
>> 1. Does this seem like a right approach?
>> 2. Was this ever attempted and is there any work left that one can continue?
>> Thanks in advance for any help!
>> Alex
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