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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