Hi Chris,
OK, I've now compiled your score (thanks for the gist, looks nice BTW)
and went through the beaming issues I could see.
First of all I must say that the new subdivision logic (introduced in
2.19.35) seems to do what I wanted and is actually an improvement:
Compare 01.png to 02.png and 03.png and tell me which one gives you a
more immediate idea of the music ...
(and just in case anyone is in doubt: 01 is the new one and how it
should be done, 02 is 2.19.34, and 03 is 2.19.19 (and any older version).
###
First issue I saw is shown in 04.png (m. 21)
Note that the music is in 6/8.
I'm not sure this qualifies as a bug as it is actually wrongly coded with
\set Timing.baseMoment = (ly:make-moment 1/16)
\set Timing.beatStructure = #'(6 6)
You should change that to
\set baseMoment = (ly:make-moment 1/8)
\set beatStructure = #'(3 3)
, then the result is correct as per 05.png.
But I suggest you don't subdivide here at all (as you have correctly do
in the l.h.) - or if you would consider subdivisions as the way to go
then at least do it in both hands.
###
However, a possible issue is shown in 06.png.
Here it may be wrong that the first beam has a beamlet instead of two
beams. This is a case for David's suggestion to write down *all* rules.
The issue is that the durations are the same as baseMoment - but here it
is used correctly (other than with the first example). This notation is
very useful if you have a single trailing note on a beam after a
subdivision, but here it seems slightly strange.
###
I couldn't reproduce the issue shown in your initial message, though.
###
Is there any issue I overlooked?
Best
Urs
Am 07.01.2016 um 00:53 schrieb Chris Yate:
> Hi,
>
> I'm wondering whether anyone can shed some light on the attached image.
>
> LH of the piano here is:
>
> {
> bf,16 (ef g8) r8
> c,16 g' c, g' bf, g'
> \clef bass
> }
>
> I have a suspicion this may have something to do with the Timing /
> beat moment and beat structure, but it's inconclusive. This section of
> the music has:
>
> \set Timing.baseMoment = #(ly:make-moment 1/16)
> \set Timing.beatStructure = #'( 6 6 )
>
> There are no barline errors, but I'm seeing this in the output quite a
> lot:
>
> programming error: mis-predicted force, 108.120472 ~= 101.465263
>
> continuing, cross fingers
>
> programming error: mis-predicted force, 108.120472 ~= 105.654382
>
> continuing, cross fingers
>
> programming error: mis-predicted force, 108.120472 ~= 101.465263
>
> continuing, cross fingers
>
>
>
> Previously I was getting a similar issue where I had bars of 6
> quavers, which were grouped in 3's -- and the middle of the second
> group was getting a spurious semiquaver beam. I seem to fixed it,
> though I'm not sure what the cause was.
>
> Thanks in advance,
>
> Chris
>
> Inline images 1
>
>
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