Re: Limited number of tracks

[Olivier Cloirec]

I'm sorry about forgetting the subject line, I had to use a webmail
because my mailer didn't work :(
Thanks for your answer, though I don't understand very well how it
works. I am reading the technical doc to learn how all is organized.

Olivier

Mats Bengtsson wrote:

> (Please always specify a Subject line in your emails.)
>
> You don't have to dig into the C++ code. Since LilyPond is
> so flexible, you can easily redefine the way the different
> context types are mapped into MIDI tracks. See
> http://mail.gnu.org/archive/html/lilypond-user/2003-01/msg00088.html
> (which really addresses the opposite problem).
>
>    /Mats
>
>
> address@hidden wrote:
>
> > Hi everybody!
> >
> > I've typeset the beggining of the 1st mvt of the 2nd Rachmaninov 
> > piano concerto.
> > I'd like to listen to it with a midi player, but there are some 
> > problems with
> > the instrumentation...
> > Acutually there are more than 16 tracks. The problem is that the midi 
> > output
> > sets one channel per track so it can't put more than 16 tracks even 
> > if some of
> > them could use the same channel :((. I don't know if it's very clear...
> >
> > I look to the C++ code, an I'm guessing the problem comes from here:
> > // from lily/performance.cc
> >
> > void
> > Performance::output (Midi_stream& midi_stream)
> > {
> >  int tracks_i = audio_staffs_.size () + 1;
> >
> >  // ugh
> >  int clocks_per_4_i = 384;
> >
> >  midi_stream << Midi_header (1, tracks_i, clocks_per_4_i);
> >  output_header_track (midi_stream);
> >  progress_indication ("\n");
> >  progress_indication (_ ("Track ... "));
> >  int channel = 0;
> >  for (int i =0; i < audio_staffs_.size (); i++)
> >    {
> >      Audio_staff *s = audio_staffs_[i];
> >      if (verbose_global_b)
> >    progress_indication ("[" + to_string (i)) ;
> >
> >      /*
> >    MIDI players tend to ignore instrument settings on
> >    channel 10, the percussion channel by default.
> >       */
> >      if (channel == 9)
> >     channel++;
> >      if (s->channel_ < 0)
> >     s->channel_ = channel;
> >      s->output (midi_stream, channel++); // oooops!!
> >      if (verbose_global_b)
> >    progress_indication ("]");
> >    }
> > }
> >
> > I send the source if you want to test it...
> > I'm using lilypond 1.7.27
> >
> > Thanks in advance for your help!
> >
> > PS: you have to run lilypond on the ts-score.ly file
> >
> >
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> >
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