Re: polymetric parts

[Mats Bengtsson]

Werner wrote:
> I want to have just 2-3 bars in a piece with different time for two voices.
> In snippets I found
> Changing time signatures inside a polymetric section using \scaleDurations
> but I don't understand that very well.
> Why doesn't lilypond just do what I write? it puts the first voice to 2/4 with
> the second instead of remaining in 3/4:
>
> one voice (and staff)
>
> ...
> \bar "||"
> \time 3/4
> e8 a~ a gis c4 | r8 e, a4 gis8 c~ | c e, a8. gis16 c4 | e,8 a r16 gis c8 des a | 
> % other voice already in 2/4
> gis8 d e4 e, | r2 r4 
> \bar "||"
> % now all in 2/4
> \time 2/4
> a4 cis | d d8 cis 
>
> another voice (and staff)
>
> ...
> \bar "||" 
> \time 3/4
> r4 r8 c, f8. e16 | gis4 c,8 f~ f e | gis4 c,8 f r16 e gis8~ | gis c, f2 
> \bar "||" 
> % one voice still in 3/4
> \time 2/4 
> e4 gis | a a8 gis | a c d f | 
> % now all in 2/4
> e4 e | f e |
>
> Could somebody explain a solution - but please very easy comprehensible :)
>
>   
By default, LilyPond assumes that the music is normal, that is, that the 
time signature is the same in all staves and that the duration of one 
beat is the same in all staves. To change that, you have to tell 
LilyPond to write separate time signatures for each stave and the 
example you refer to shows how to do that. Also, LilyPond has to know if 
a specific note in one stave should be typeset to the left or to the 
right or below a certain note in the other stave (i.e. if it should be 
played before, after or simultaneously). Therefore, LilyPond has to know 
the mathematical relation between the beats in the different staves 
(which is done using \scaleDurations).

Clearer?

   /Mats
> Greeting
>
> Werner
>
>
>
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> lilypond-user mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/lilypond-user
>   

--
=============================================
        Mats Bengtsson
        Signal Processing
        School of Electrical Engineering
        Royal Institute of Technology (KTH)
        SE-100 44  STOCKHOLM
        Sweden
        Phone: (+46) 8 790 8463                         
       Fax:   (+46) 8 790 7260
        Email: address@hidden
        WWW: http://www.s3.kth.se/~mabe
=============================================