Re: Why is midiInstrument a Staff property

[Mats Bengtsson]

> Bernd Warken <address@hidden> writes:
> 
> > > If you want different instruments for two voicess, you must put them
> > > on different staffs, ie, you probably need a dedicated midi score
> > > definition:
> >  
> > That is very bad.  So you are forced to write different source files
> > for graphical and midi output.
> 
> No, in these cases you need just a dedicated midi score block, see my
> previous message.

Why not exploit the flexibility of Lilypond. Just add 
the following lines in your file and you'll get a separate
instrument for each Voice:
(the original definitions can be found in ly/performer.ly)

\midi{
  \translator{
%    \type "Staff_performer";
    \type "Performer_group_performer";
    \name Staff;
    \accepts Voice;

    \consists "Key_performer";
    \consists "Tempo_performer";
    \consists "Time_signature_performer";
    dynamicStyle = #"dynamic"
  }
  \translator{
%    \type "Performer_group_performer";
    \type "Staff_performer";
    \name Voice;
% All notes fall to Grace if you leave Thread out (huh?)
    \consists "Dynamic_performer";
    \consists "Span_dynamic_performer";
    \consists "Piano_pedal_performer";
    \consists "Grace_position_performer";
    \accepts Thread;
    \accepts Grace;
  }
}


One disadvantage of changing current default is that there's
a limited number of channels available in MIDI, so you don't
want to waste separate channels on each divisi in a big
orchestral score.

   /Mats