Re: cadenzaToMusic function, odd behavior causing barcheck failures
On 29/07/14 04:46, James Harkins wrote:
Hi,
Some time ago, a user here gave me a cadenzaToMusic function, which
could stretch rests in non-cadenza parts to match the duration of a
cadenza. (That's because I was having problems with compressing the
cadenza music to fit in a normal-length bar.)
More for information to the list really@
Part of the original thread you had it seems was from 2012 - it's only
fair when you say 'sometime ago' as this will make a difference on the
version of LP you were using at the time.
http://lists.gnu.org/archive/html/lilypond-user/2012-04/msg00125.html I
think is that thread.
Which seems to imply this was originally written for \version 2.14.x and
you're now using 2.18.x - again just to confirm so that the dev who
helped (Thomas Morely by the looks of it) has a chance
;)
I've used it in a couple of pieces and it's worked beautifully so far,...
In those 'so far' pieces, were they all for LP 2.14.x or was it working
in a case for LP 2.18.2 (i.e. is this the first time you are using
2.18.2 and find it no longer works as expected)?
James
(whole rest, fermata) | 2/4 R2 | 6/8 (next section)
Instead, I get
(whole rest, fermata) | 2/4 R2 ...
... and here, the 6/8 appears in the middle of the bar. It looks like
the barlines are calculated as if the 2/4 bar contained three quarters.
The issue doesn't reproduce in two cases:
- If I replace the \cadenzaToMusic in the \score block with rests
adding up to the right duration, or
- If I put the part with the cadenza notes (with *no* \cadenzaToMusic)
in the lowest staff. (I can't do that b/c it's a clarinet cadenza and
the piece also uses bassoon.)
I'm really quite perplexed why this is happening. Can someone take a
look?
Thanks,
hjh
\language english
\version 2.18.2
cadenzaToMusic =
#(define-music-function (parser location cadenzaMusic music)
(ly:music? ly:music?)
Adjust the length of `music and the measureLength, to fit the
length of
`cadenzaMusic
(let* ((clen (ly:music-length cadenzaMusic))
(mlen (ly:music-length music))
(factor (ly:moment-div clen mlen))
(compressed (ly:music-compress music factor)))
;; (format #t factor : ~a\n factor)
#{
\set Timing.measureLength = $clen
$compressed
\unset Timing.measureLength
#}))
clarCadenzaC = { \cadenzaOn \repeat unfold 31 r8 \cadenzaOff }
globalB = {
\time 4/4
\cadenzaOn \cadenzaToMusic \clarCadenzaC s1 \cadenzaOff
\bar |
\time 2/4 s2
\time 6/8 s2.
}
\score { \new Staff
\globalB
\relative c' {
\cadenzaOn
% use the following line: barcheck failed, and 6/8 meter is in
the wrong place
\cadenzaToMusic \clarCadenzaC r1\fermata
% use the following line instead (comment the previous one), no
problem
%r8 \repeat unfold 15 { r4 } % = 31 eighth notes
\cadenzaOff
R2
cs8 d e cs4.
}
}
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Re: cadenzaToMusic function, odd behavior causing barcheck failures
On Jul 29, 2014 7:29 AM, James pkx1...@gmail.com wrote: On 29/07/14 04:46, James Harkins wrote: Some time ago, a user here gave me a cadenzaToMusic function, which could stretch rests in non-cadenza parts to match the duration of a cadenza. (That's because I was having problems with compressing the cadenza music to fit in a normal-length bar.) More for information to the list really@ Part of the original thread you had it seems was from 2012 - it's only fair when you say 'sometime ago' as this will make a difference on the version of LP you were using at the time. http://lists.gnu.org/archive/html/lilypond-user/2012-04/msg00125.html I think is that thread. Which seems to imply this was originally written for \version 2.14.x and you're now using 2.18.x - again just to confirm so that the dev who helped (Thomas Morely by the looks of it) has a chance Good point. I just double-checked the source for the 2012 piece. I used 2.15.36 for it. (And thanks for tracking down the old thread -- now I can give proper credit in the new piece's acknowledgments!) I also used a modified version of the function, which skips setting the measureLength, for a 2013 piece that I compiled with 2.16.2. In those 'so far' pieces, were they all for LP 2.14.x or was it working in a case for LP 2.18.2 (i.e. is this the first time you are using 2.18.2 and find it no longer works as expected)? I had never used it with 2.18.x before -- first try with 2.18, first time it failed. It's got to be something with the set Timing.measureLength -- the time signature engraver puts 6/8 in the right place rhythmically, but the barlines appear as if the 2/4 bar were actually 3 beats. Will play with it some more in a little while. Thanks, hjh ___ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user
Re: cadenzaToMusic function, odd behavior causing barcheck failures
James pkx1...@gmail.com writes:
\language english
\version 2.18.2
cadenzaToMusic =
#(define-music-function (parser location cadenzaMusic music)
(ly:music? ly:music?)
Adjust the length of `music and the measureLength, to fit the
length of
`cadenzaMusic
(let* ((clen (ly:music-length cadenzaMusic))
(mlen (ly:music-length music))
(factor (ly:moment-div clen mlen))
(compressed (ly:music-compress music factor)))
;; (format #t factor : ~a\n factor)
#{
\set Timing.measureLength = $clen
$compressed
\unset Timing.measureLength
#}))
Uh, \unset Timing.measureLength? I don't think that LilyPond is going
to be happy with an unset measure length.
--
David Kastrup
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Re: cadenzaToMusic function, odd behavior causing barcheck failures
On Tuesday, July 29, 2014 11:15:50 AM EDT, David Kastrup wrote:
Uh, \unset Timing.measureLength? I don't think that LilyPond is going
to be happy with an unset measure length.
That makes sense, but does it apply to this case? There's a meter change
just after the \cadenzaToMusic call; wouldn't that reset the measure length
to that of the new time signature?
That is, if we have:
someMoment:
\set Timing.measureLength = $clen
music...
someMoment + music's duration:
\unset Timing.measureLength
\time 2/4
Will LilyPond unset the measure length, and then set it to a moment of 1
2? Or will the unset somehow override what \time is doing? (It seems to be
more like the latter, by observation, but this makes no sense.)
In any case, I found a solution for my score: instead of stretching rests
in other parts to match the cadenzas' durations, compress the cadenza notes
to match the duration of the other parts' rests.
squeezeCadenza =
#(define-music-function (parser location targetDur music)
(ly:moment? ly:music?)
Adjust the length of `music and the measureLength, to fit the length of
`cadenzaMusic
(let* ((mlen (ly:music-length music))
(factor (ly:moment-div targetDur mlen))
(compressed (ly:music-compress music factor)))
#{
$compressed
#}))
Resting part: \cadenzaOn R1 \cadenzaOff
Solo part: \cadenzaOn \squeezeCadenza #(ly:make-moment 1 1) \cadenzaNotes
\cadenzaOff
... and the subsequent meter changes behave as they should.
hjh
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cadenzaToMusic function, odd behavior causing barcheck failures
Hi,
Some time ago, a user here gave me a cadenzaToMusic function, which could
stretch rests in non-cadenza parts to match the duration of a cadenza.
(That's because I was having problems with compressing the cadenza music to
fit in a normal-length bar.)
I've used it in a couple of pieces and it's worked beautifully so far, but
failed in the case below. I expect to get:
(whole rest, fermata) | 2/4 R2 | 6/8 (next section)
Instead, I get
(whole rest, fermata) | 2/4 R2 ...
... and here, the 6/8 appears in the middle of the bar. It looks like the
barlines are calculated as if the 2/4 bar contained three quarters.
The issue doesn't reproduce in two cases:
- If I replace the \cadenzaToMusic in the \score block with rests adding up
to the right duration, or
- If I put the part with the cadenza notes (with *no* \cadenzaToMusic) in
the lowest staff. (I can't do that b/c it's a clarinet cadenza and the
piece also uses bassoon.)
I'm really quite perplexed why this is happening. Can someone take a look?
Thanks,
hjh
\language english
\version 2.18.2
cadenzaToMusic =
#(define-music-function (parser location cadenzaMusic music)
(ly:music? ly:music?)
Adjust the length of `music and the measureLength, to fit the length of
`cadenzaMusic
(let* ((clen (ly:music-length cadenzaMusic))
(mlen (ly:music-length music))
(factor (ly:moment-div clen mlen))
(compressed (ly:music-compress music factor)))
;; (format #t factor : ~a\n factor)
#{
\set Timing.measureLength = $clen
$compressed
\unset Timing.measureLength
#}))
clarCadenzaC = { \cadenzaOn \repeat unfold 31 r8 \cadenzaOff }
globalB = {
\time 4/4
\cadenzaOn \cadenzaToMusic \clarCadenzaC s1 \cadenzaOff
\bar |
\time 2/4 s2
\time 6/8 s2.
}
\score {
\new Staff
\globalB
\relative c' {
\cadenzaOn
% use the following line: barcheck failed, and 6/8 meter is in the
wrong place
\cadenzaToMusic \clarCadenzaC r1\fermata
% use the following line instead (comment the previous one), no
problem
%r8 \repeat unfold 15 { r4 } % = 31 eighth notes
\cadenzaOff
R2
cs8 d e cs4.
}
}
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