Re: multi-tempi

[Hans Roels]

Maybe my question was't clear enough but I am not looking for a
polymetric notation but a notation for different tempi, I want to remain
the original parts in their original meter and tempo. I only want to
adjust the graphical spacing to have a visual indication of the
(unexisting) overall timing (a kind of underlying visual time
grid).

(see further)

At 18:20 14/06/2010, James Bailey wrote:

> On 14.06.2010, at 15:20, Hans
> Roels wrote:
>
> > I don't really know Lilypond well (I just had a quick look at the 
> > documentation)
> > but I have some music notation problems and maybe somebody could 
> > tell me if
> > Lilypond is the right tool to solve my problems.
> >
> > 1. Is it possible to create a score with a fixed number of seconds 
> > (not bars)
> > per system?
>
> I would do this myself. i.e., in 4/4, with a tempo of 4=60, and 
> arbitrarily decide 16 seconds per system means
> s1*4\break

If the original is in tempo 74 and in 3/4 and I want to have 16 seconds
per system, the break should be be after 19.75 beats. Is this possible
without rewriting the original score to 4/4?


> > 2. Is it possible to create a
> > score with different parts/voices  
> > that each have a
> > different tempo? for example a score with a first part in tempo 56 
> > bpm, a second
> > in 64 bpm and a third in 92 bpm?
>
> I would do this by calculating the tempo, i.e., 8=128 (8/8) / 4=92 
> (4/4) and simply applying the principles in section 1.2.3 of the 
> Notation Reference, under Polymetric notation.
Same remark
now: suppose that the first part of the multi-tempo is in tempo 56 in
3/4. Is it possible to write everything on top of a 'hidden' time grid of
tempo = 60, meaning that the visual length of a measure of part A would
equal 3.21 quarter notes in tempo 60 but would be notated in meter 3/4 (3
quarter notes would fill the measure).
I had a look at the section about polymetric notation in the Notation
Reference, I guess I need a combination of the scaleDurations command (
"Staves with different time signatures, equal measure
lengths" ) and moving the Timing_translator to each staff
("Staves with different time signatures, unequal bar
lengths" ) . Is this possible? Did anyone try this?