Tempo change in Midi file

[Neil Killeen]

Hello


according to the mail archives, I should just insert a \tempo directive
whenever I want to change the tempo (I think this should be in the
manual).


1) For multiple staff music, should I insert just one
   set of markings for one of the staves (does it matter
   which one) or should they all have a (redundant)
   tempo marking ?


2) Regardless, this does not seem to function.  Here is a little bit of test 
  music.

sopNotes = {
   \relative c' {
      \tempo 4=100
      e2 e2 e2 e2  e2 e2 e2 e2
      \tempo 4=50
      e2 e2 e2 e2  e2 e2 e2 e2
    }
}
%
mezNotes = {
   \relative c' {
      \tempo 4=100
      c2 c2 c2 c2 c2 c2 c2 c2
      \tempo 4=50
      c2 c2 c2 c2 c2 c2 c2 c2
    }
}

\score {
\new ChoirStaff
<<
 \new Staff  { \context Voice = sop { \sopNotes } }
%
 \new Staff { \context Voice = mez { \mezNotes } }
%
> >
\layout {}
\midi {}
}


The resultant midi file (attached)  does not change tempo.  It makes no
difference whether I use one staff or two (and also if I
use one staff and drop the \new ChoirStaff syntax it also
does not work).

I am using V 2.6.3-1 on a Mac Powerbook


regards
Neil

tempo.midi
Description: MIDI audio