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Re: Bar counts and repeats in repetitive music
From: |
Jeffery Shivers |
Subject: |
Re: Bar counts and repeats in repetitive music |
Date: |
Fri, 17 Feb 2017 12:24:11 -0500 |
> The bar number check works, but the printed bar numbers are still sequential,
> which I don't understand.
It was clear that this was a context issue, but not so clear how to
address that. For the record, context-spec-music was the procedure
that makes this work. The following passes check and engraves as
intended:
=== begin snippet
repeatSect =
#(define-music-function (parser location num mus)
(number? ly:music?)
(define startBar #f)
#{
#(make-apply-context
(lambda (context)
(let ((currentBar (ly:context-property context 'currentBarNumber)))
(set! startBar currentBar))))
\repeat volta #num { #mus }
#(context-spec-music
(make-apply-context
(lambda (context)
(let* ((endBar (ly:context-property context 'currentBarNumber))
(repLength (- endBar startBar))
(lenScaled (* repLength num))
(nextBar (+ startBar lenScaled)))
(ly:context-set-property! context 'currentBarNumber nextBar))))
'Score)
#})
\score {
\new Staff {
\override Score.BarNumber.break-visibility = #'#(#t #t #t)
\barNumberCheck #1
\repeatSect 4 { \rhPatternA }
% adds 4 bars ... (1 + 4 = 5)
\barNumberCheck #5
\repeatSect 16 { \rhPatternA }
% adds 16 bars ... (5 + 16 = 21)
\barNumberCheck #21
\repeatSect 4 { \rhPatternB }
% adds 4 bars ... (21 + 4 = 25)
\barNumberCheck #25
\repeatSect 2 { \rhPatternA }
}
}
=== end snippet
> But it's also essential that the performer is told how many times to repeat
> each fragment! At the moment I've chickened out and used percent repeats with
> counts :(
I'll have a look at this - probably a matter of adding a new engraver;
I've seen a trick that used \Dynamic context to display centered
measure numbers before, so maybe something like that.
On Fri, Feb 17, 2017 at 11:44 AM, Peter Toye <address@hidden> wrote:
> Jeffery,
>
> Thanks. There's a lot to look at here, as I'm not (yet?) a Scheme/Guile
> programmer! But as you hint it doesn't seem to work, though. The bar number
> check works, but the printed bar numbers are still sequential, which I don't
> understand.
>
> But it's also essential that the performer is told how many times to repeat
> each fragment! At the moment I've chickened out and used percent repeats
> with counts :(
>
> Best regards,
>
> Peter
> mailto:address@hidden
> www.ptoye.com
>
> -------------------------
>> Without investigating how the bar number engraver (I'm guessing, or
>> whatever engraves them), I am unsure how to correct what actually
>> gets *engraved* (which is obviously important), but here's a partial
>> solution.
>>
>> \adjustBarNum applies the repeats and does the calculations, and
>> seems to reset each next *currentBarNumber* to what it should be.
>> Maybe someone with more knowledge of how bar numbers are engraved
>> can have a look and see what is wrong/missing.
--
Jeffery Shivers
jefferyshivers.com
soundcloud.com/jefferyshivers
- Bar counts and repeats in repetitive music, Peter Toye, 2017/02/07
- Re: Bar counts and repeats in repetitive music, ptoye, 2017/02/16
- Re: Bar counts and repeats in repetitive music, Jeffery Shivers, 2017/02/16
- Re: Bar counts and repeats in repetitive music, Jeffery Shivers, 2017/02/16
- Re: Bar counts and repeats in repetitive music, ptoye, 2017/02/16
- Re: Bar counts and repeats in repetitive music, Jeffery Shivers, 2017/02/16
- Re: Bar counts and repeats in repetitive music, Peter Toye, 2017/02/17
- Re: Bar counts and repeats in repetitive music,
Jeffery Shivers <=
- Re: Bar counts and repeats in repetitive music, Jeffery Shivers, 2017/02/17
- Re: Bar counts and repeats in repetitive music, David Nalesnik, 2017/02/17
- Re: Bar counts and repeats in repetitive music, Peter Toye, 2017/02/17
- Re: Bar counts and repeats in repetitive music, David Nalesnik, 2017/02/17
- Re: Bar counts and repeats in repetitive music, David Nalesnik, 2017/02/17
- Re: Bar counts and repeats in repetitive music, Peter Toye, 2017/02/18
- Re: Bar counts and repeats in repetitive music, David Nalesnik, 2017/02/18
- Re: Bar counts and repeats in repetitive music, Peter Toye, 2017/02/18
- Message not available
- Message not available
- Re: Bar counts and repeats in repetitive music, Peter Toye, 2017/02/28
- Re: Bar counts and repeats in repetitive music, Jeffery Shivers, 2017/02/28