Re: No Midi w/ crescendo

[philippe hezaine]

Mats Bengtsson wrote:

> This is a well-known bug in the MIDI output. The problem is that you 
> never specified any absolute dynamics (like \p or \mf or \ff or ...)
> before the crescendo, so LilyPond has no idea on what dynamics to start
> the crescendo. For some silly reason, it then doesn't start at the 
> default dynamics level but keeps the full crescendo almost silent.
>
> This very problem isn't documented in the section on "Creating MIDI 
> files", but there you can find descriptions on other similar problems 
> and also
> a simple way to remove all dynamics handling in the MIDI output while 
> keeping it in the printed output, which makes sense for proof listening.
>
>   /Mats
>
> Quoting John Mandereau <address@hidden>:
>
> > Kamal wrote:
> >
> > > I am using lilypond 2.8.6
> > >
> > > If I use the following code snippet:
> > > a\< b c d\!
> > >
> > > then a silent passage will be produced in the midi output although the
> > > documentation says that unterminated crescendos will produce that.
> > >
> > > Can can this be overcome?
> >
> > As far as I have experienced with midi players (mainly with Timidity),
> > (de)crescendi mess up MIDI files from LilyPond playing. I don't know if
> > it's LilyPond or Timidity fault.
> >
> > As a workaround, I remove any \<, \< and \! when I want MIDI output.
> >
> > Cheers,
> > --
> > John Mandereau <address@hidden>
At home, I put (de)crescendi in a variable named dynamics, like in the 
template
Piano centered dynamics (  in manuel-2.9.23-1, Chapitre D.2.4 ).
Then, for the midi block where you have a second score block (see below)
I comment  or suppress the dynamics for the midi
like this:      (  %\dynamics ) and I've no problem for the midi file.

\score {
   \unfoldRepeats
      \context PianoStaff <<
        \context Staff=upper  \upper %\dynamics
        \context Staff=lower << \lower %\dynamics
   >>
      >>
      \midi {
   \tempo 4=126
        \context {
          \type "Performer_group"
          \name Dynamics
        }
 
        \context {
          \PianoStaff
          \accepts Dynamics
        }
      }
    }