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Re: Repeats in \parallelMusic


From: Jacques Menu
Subject: Re: Repeats in \parallelMusic
Date: Wed, 26 Aug 2015 17:12:07 +0200

Hello David,

Wouldn’t all that be much simpler without \parallelMusic, with just one 
variable per staff contents?

JM


> Le 26 août 2015 à 16:02, David Sumbler <address@hidden> a écrit :
> 
> On Wed, 2015-08-26 at 14:10 +0200, David Kastrup wrote:
>> David Sumbler <address@hidden> writes:
>> 
>>> is it
>>> possible to have repeats starting and ending within a bar when using
>>> \parallelMusic?
>>> 
>>> \version "2.18.0"
>>> 
>>> \parallelMusic #'(Vone Vtwo) {
>>> %bar 1
>>>    \repeat volta 2 {
>>>     d''2 d'' |
>>>     f'2 f' |
>>> %bar 2    
>>>     c''2 c'' |
>>>     e'2 e' |
>>>    }
>>> %bar 3
>>>    g''1 |
>>>    c''1 |
>>> }
>>> 
>>> \score { <<
>>>    \new Staff { \Vone }
>>>    \new Staff { \Vtwo }
>>>>> }
>>> 
>>> That, of course, works fine.
>>> 
>>> But suppose that the repeat should start in the middle of bar 1 and end
>>> in the middle of bar 2.  This is easily done when setting the parts
>>> separately; but can it be done within a \parallelMusic structure?  On
>>> the face of it, the answer would seem to be "no".
>>> 
>>> Or is it?
>> 
>> Any reason you neither try it out nor add any template to demonstrate
>> on?  A user list is primarily a knowledge resource: making use of the
>> different knowledge and skill levels of the participants for overcoming
>> hurdles, not for running the whole track.
>> 
>> It should be easy enough for yourself to modify the example such that
>> the repeats are on partial measure positions.
> 
> With respect, I could see no obvious way in which it could be done,
> which is why I asked.  I suppose it was the proverbial "stupid
> question".
> 
> Anyway, after trying several more (im)possibilities, I found a method
> that worked but produced error messages.  Then I remembered Stephen
> MacNeil's helpful suggestion a few months ago regarding incomplete final
> bars.  An example is:
> 
> \version "2.18.0"
> 
> \parallelMusic #'(Vone Vtwo) {
> %bar 1
>    \set Score.measureLength = #(ly:make-moment 3/4) c''2. |
>    \set Score.measureLength = #(ly:make-moment 3/4) e'2. |
>    \repeat volta 2 {
>       \set Score.measureLength = #(ly:make-moment 1/4) d''4 |
>       \set Score.measureLength = #(ly:make-moment 1/4) f'4 |
> %bar 2
>       \set Score.measureLength = #(ly:make-moment 4/4) e''1 |
>       \set Score.measureLength = #(ly:make-moment 4/4) g'1 |
> %bar 3
>       d''1 |
>       f'1 |
> %bar 4    
>       \set Score.measureLength = #(ly:make-moment 3/4) c''2. |
>       \set Score.measureLength = #(ly:make-moment 3/4) e'2. |
>    }
>    \set Score.measureLength = #(ly:make-moment 1/4) b'4 |
>    \set Score.measureLength = #(ly:make-moment 1/4) d'4 |
> %bar 5
>    \set Score.measureLength = #(ly:make-moment 4/4) c''1 |
>    \set Score.measureLength = #(ly:make-moment 4/4) e'1 |
> }
> 
> \score {
>    <<
>       \new Staff { \Vone }
>       \new Staff { \Vtwo }
>>> 
> }
> 
> Not exactly succinct, but it works.  I am sending this to the list (a)
> so that I can find it again when I actually need it (b) in case somebody
> knows a neater solution to the problem.
> 
> David
> 
> 
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