Mats
I have waded back through the archives on this issue. There appear to
be two basic statements of truth :
1) Many people commented that *only* midi files produced by Lilypond
had this problem. This has been my experience too, that I can happily
play tempo-changing MIDI files from other programs ( I installed
4 different MIDI players as well as Quicktime and Realplayer and none
of them picked up the tempo changes).
2) Nigel Warner made an analysis - see
http://lists.gnu.org/archive/html/lilypond-user/2003-10/msg00286.html
where he found that the tempo changes were not in track 0 (the conductor
track) where he asserted they should be (his argument made good sense to
me).
You commented that it was you who had removed the tempo changes from
track 0
as you endeavoured to provide other functionality; see
http://lists.gnu.org/archive/html/lilypond-user/2003-10/msg00296.html
However, no fix appears to have ever been made and this bug remains.
I do find MIDI files very useful. When I write some music, these
are my first real chance to hear how it sounds as a whole, despite
the limitations of MIDI so I would be greatful if some small effort
could go into fixing this.
regards
Neil
From: Mats Bengtsson <[EMAIL PROTECTED]>
To: Neil Killeen <[EMAIL PROTECTED]>
CC: lilypond-user@gnu.org
Subject: Re: Tempo change in Midi file
Date: Mon, 24 Oct 2005 15:55:48 +0200
I think there was an insightful email in the mailing lists a couple of
years ago that explained that the current solution of handling MIDI
tempo changes will only work with certain MIDI players but not
with all. I just tried to listen to your example using kmidi (which
internally uses timidity, a software-only MIDI interpreter) and it
certainly plays the correct tempo changes, but it may fail for your
combination of sound card and software.
/Mats
Neil Killeen wrote:
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
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=============================================
Mats Bengtsson
Signal Processing
Signals, Sensors and Systems
Royal Institute of Technology
SE-100 44 STOCKHOLM
Sweden
Phone: (+46) 8 790 8463
Fax: (+46) 8 790 7260
Email: [EMAIL PROTECTED]
WWW: http://www.s3.kth.se/~mabe
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