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Re: problems with repeats-doc, was: afterGrace

From: Till Rettig
Subject: Re: problems with repeats-doc, was: afterGrace
Date: Sat, 19 May 2007 16:40:00 +0300
User-agent: Thunderbird (X11/20070306)

I would prefer the second one as being more "norm" -- though the first one is also completely understandable.
If we would choose the second one I would suggest to replace the paragraph before with something like:

"The next example shows a volta repeat with a partial measure. Note that the upbeat is excluded from the repeat
but present inside the first volta bracket. The second volta bracket contains a complete measure, but the last
measure of the piece is shortened due to the partial measure at the beginning. See also @ref{Partial measures}
for this convention. The partial measure doesn't affect the repeat."

But then -- as I wrote this it appeared to me that this is nothing new nor extra, so would it be better to skip the whole
example, because it doesn't introduce anything new?


John Mandereau wrote:
Le samedi 19 mai 2007 à 12:18 +0300, Till Rettig a écrit :
John Mandereau wrote: 
As always, don't fear asking other questions about unclear docs details
like the afterGraceFraction thing.
;-) Yes, here is another one! I don't understand the logic behind the
second example 
with volta repetition in 6.7.2. In my understanding the first fourth
in the second volta (that 
is fourth repeat time) doesn't belong here. I would repeat the first
part three times, and thus 
the upbeat fills the gap left by in the first volta which contains
only three beats. But then 
I would skip the first volta and go directly to the second, and
suddenly I have one beat too much 
in my music. What kind of convention is this meant to be?

I assume the word you mean by 'fourth' is 'quarter (note)' in American
English, isn't it?

Well, I agree with you the first quarter a is extraneous, it should be

\new Staff {
       \partial 4
       \repeat volta 4 { e | c2 d2 | e2 f2 | }
       \alternative { { g4 g g } { \set Timing.measurePosition = #(ly:make-moment 0 4) a a a a | b2. } }

but there is also a cleaner solution:

\new Staff {
       \partial 4 e4
       \repeat volta 4 { c2 d2 | e2 f2 | }
       \alternative { { g4 g g e } { a a a a | b2. } }

IIRC I have already seen the second solution in printed scores, but not
the first.  Which one should we put in the manual?


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