Re: Export from LilyPond to MusicXML (Thomas Morley)

[Jan-Peter Voigt]

Hello Peter, and all,

I spotted the problem with the OLL export-solution in 2.22+:
In api.scm ll. 278,279 the call to ly:grob-properties fails. In that
acknowledger block the stem direction is recorded. I'll look how to fix
that later. If you like to try it out, you can temporarily just delete
or comment that block (ll. 274-281).

Cheers,

Jan-Peter

Am 07.10.21 um 11:49 schrieb Jan-Peter Voigt:
> Hello Peter,
>
> yes, I still receive the messages from the list, but since I have
> changed jobs, my commitment to Lilypond has fallen behind a bit.
> But I hope to curate and update my code soon so that it can serve as a
> starting point for further development. Of course, Jacque's work should
> not be lost sight of, as native support would be nice. But maybe the
> scheme-engraver based solution can push the issue a bit.
> This topic has been on my mind for quite some time. Since Lilypond does
> not offer XML export, its use is problematic in many areas. If I want to
> offer something to a publisher, I can't get anywhere with Lilypond in
> most cases. If I want to archive the notes in a structured way, I can
> come up with 1001 solutions in Scheme that fill a database. But if I
> have curated data in MEI format (or MusicXML), I can systematically feed
> a database (e.g. eXist) with it and provide a REST API afterwards to
> build fancy Webapps.
>
> Best regards,
>
> Jan-Peter
>
>
>
> Am 07.10.21 um 11:30 schrieb Peter Toye:
>> The potential need has gone away now - my Sibelius user has told me that
>> he uses ScoreMuse to export the PDF into a suitable format for Sibelius.
>> Looks to me like an expensive way of doing it, but if he can afford
>> Sibelius he can probably afford ScoreMuse as well.
>>
>>  
>>
>> I agree that exchanging music information between different engravers is
>> an extremely complex problem and I don't underestimate the difficulty.
>>
>>  
>>
>> I tried Jan-Peter's code on Github, but it seems to be broken on recent
>> versions of LilyPond. I'm told it works on 19.0  but I don't have
>> that version any more. And I don't have a contact for him to ask - is he
>> on this mailing list?
>>
>>
>> Best regards,
>>
>>
>> Peter
>>
>> mailto:lilypond@ptoye.com <mailto:lilypond@ptoye.com>
>>
>> www.ptoye.com <https://www.ptoye.com>
>>
>>
>> -------------------------
>>
>> Wednesday, October 6, 2021, 8:05:12 PM, Jean Abou Samra wrote:
>>
>>
>>     Le 05/10/2021 à 13:08, Peter Toye a écrit :
>>
>>
>>         Sorry - edited subject to get the linking correct
>>
>>
>>          Harm,
>>
>>
>>         
>> https://music.stackexchange.com/questions/42315/lilypond-to-musicxml-to-sibelius#73706
>>         
>> <https://music.stackexchange.com/questions/42315/lilypond-to-musicxml-to-sibelius#73706>
>>  >
>>         
>> <https://music.stackexchange.com/questions/42315/lilypond-to-musicxml-to-sibelius#73706
>>         
>> <https://music.stackexchange.com/questions/42315/lilypond-to-musicxml-to-sibelius#73706>>
>>  has
>>         > a discussion about this as well. I've started looking at >
>>         the OpenLilyLib solution at the bottom of the thread but it
>>         doesn't > work on later versions of LilyPond.
>>
>>
>>         It would seem to me that using LP's parsing mechanisms is the
>>         right > way to go about it, and I'd offer to help if my health
>>         allowed. Is > there anyone on this mailing list who knows about it?
>>
>>
>>
>>
>>     About the parsing? Certainly, but the potentiel
>>     project spans many different areas of LilyPond.
>>     And he design space is vast.
>>
>>
>>     With Jacques Menu, we some had private discussions
>>     about this. It may be feasible to implement XML export
>>     by utilizing Jacque's musicformats library (see
>>     his post). So far I only have rough ideas about
>>     the LilyPond part, and it is not my current priority.
>>
>>
>>     I think the most advanced solution so far is Jan-Peter's
>>     https://github.com/openlilylib/lilypond-export
>>     <https://github.com/openlilylib/lilypond-export>
>>     https://lists.gnu.org/archive/html/lilypond-devel/2018-10/msg00068.html
>>     <https://lists.gnu.org/archive/html/lilypond-devel/2018-10/msg00068.html>
>>     (CCing him). One could start off from that.
>>
>>
>>         It's something I will probably need soon.
>>
>>
>>
>>
>>     By do means do try to help out, but don't
>>     hold your breathe for it. It is a large
>>     endeavor.
>>
>>
>>     Best,
>>     Jean
>>
>
>