Re: Rallentando and accelerando in MIDI

[David Sumbler]

On Wed, 2014-12-31 at 11:52 +0100, Simon Albrecht wrote:
> Am 31.12.2014 00:32, schrieb David Sumbler:
> > On Tue, 2014-12-30 at 22:04 +0100, Simon Albrecht wrote:
> >> Am 30.12.2014 13:16, schrieb David Sumbler:
> >>> Further to my query (below) yesterday about varying ralls and accels in
> >>> midi, how do I actually get these to work at all?
> >>>
> >>> At the moment the articulate script is working correctly in executing
> >>> trills, slurs etc.  But it ignores my "rit." markings and suchlike.  I
> >>> have tried entering these using "\mark \markup" and also attaching
> >>> "markup" to a note, but my midi files do not vary the tempo at all.
> >>>
> >>> What syntax should I use to enter ralls and accels in a score?
> >> It’s not wholly clear what you tried, but I’d assume that <code>\tempo
> >> "rit."</code> is what you want. The difference from \mark is mainly that
> >> it lives in score and thus is printed only once above all staves, no
> >> matter how many parts have the same tempo marking. And probably
> >> articulate.ly will then interpret it correctly (yet I don’t have any
> >> experience with that).
> >>
> >> HTH, Simon
> > Thanks for that suggestion, which I have now tried.  Unfortunately it
> > does not seem to have the hoped-for result.
> >
> > But it does raise another interesting question: how do I get tempo
> > markings etc. to appear once above the score but also in each individual
> > part?  I cannot find any reference to this in the Lilypond documentation
> > (although I am sure it must be in there somewhere).  Previous pieces I
> > have set in Lilypond have been for a single instrument or for a solo
> > instrument with piano, so the question has not arisen before (because
> > the markings are above the solo part in any case).  Do I perhaps need to
> > have them in something like a separate Dynamics context which can be
> > included in each part when it is extracted?
> >
> > David
> >
> No, normally you would do something like
> 
> \layout {
>    \context { \Score
>       \remove "Metronome_mark_engraver" }
>    \context { \StaffGroup % or Staff or GrandStaff or whatever...
>       \consists "Metronome_mark_engraver" }
> }
> 
> If thus every StaffGroup has its own Metronome_mark_engraver, separate 
> tempo indications will be printed above each of them.
> 
> HTH, Simon

Clearly I am doing something wrong - perhaps it is to do with the way I
have entered my tempo markings.  Just to make things clearer, I am
setting a saxophone quartet (that I wrote in 1978!); I want tempo
markings to appear once above the top line in the score, but naturally I
also want these markings to appear in the extracted parts for the 4
instruments.

I have added the context change in both the score and one of the parts,
and tried with both "Staff" and "StaffGroup" (since the score consists
of 4 staves in a StaffGroup).  But I still get one tempo mark (as
required) in the score and none in the parts apart from the top
instrument (soprano sax.).  All this is exactly what I get without the
context change lines.

In the music expression I have "\tempo "Moderato" 4 = 104" before the
notes for the soprano sax.  This is fine in the score and the soprano
part, but of course I need this marking (and subsequent ones too) to
appear also in the alto, tenor and baritone parts.

David