Re: ob-lilypond.el doesn't generate midi files

[Michael Maurer <maurer.michael@gmail.com>]

On Thu, 26 Aug 2021 at 21:54, Nick Dokos <ndokos@gmail.com> wrote:
>
> Michael Maurer <maurer.michael@gmail.com> writes:
>
> > On Thu, 26 Aug 2021 at 15:03, Jonathan Gregory <jgrg@autistici.org> wrote:
> >>
> >> Hi
> >>
> >> On 26 Aug 2021, Michael Maurer wrote:
> >>
> >> > I've installed lilypond and customized ob-lilypond to use the
> >> > appropriate helper programs, but although it generates & shows
> >> > pdfs just fine, generating a midi file it does not. I execute
> >> > tangle on the codeblock, and all I get is "No midi file
> >> > generated so can't play!". org-version 9.4.6 emacs 27.2 Win 10
> >>
> >> Can you also send a MWE of the code you're using to generate the
> >> score?
> >>
> >
> > I used a test file I copied over from Frescobaldi
> >
> > #+begin_src lilypond :file test.pdf
> > \version "2.18.2"
> > \score {
> > \drums {
> >   \time 2/4
> >   sn16 sn8 sn16 sn8 sn8:32 ~
> >   sn8 sn8 sn4:32 ~
> >   sn4 sn8 sn16 sn16
> >   sn4 r4
> > }
> >   \layout { }
> >   \midi { }
> > }
> > #+end_src
> >
> > In Frescobaldi this gets me both midi-output and pdf. In Emacs with
> > org it does say "Midi output to test.midi", but then there's that "no
> > midi file generated" message.
> >
>
> What happens if you save the contents of the source block into a file
> and run lilypond on the file from the command line?
>

Both pdf and midi files get generated. Btw, ob-lilypond does generate
the midi file as well, it just doesn't want to play it/recognize it.
Maybe it's related to what helper app I've configured to open it? (but
why that doesn't make sense, it's vlc btw).