2018-08-07 12:23 GMT+02:00 James Lowe <[email protected]>:
>> timeSignatureFraction: (4 . 8)
>> beatStructure: (2 2)
>> baseMoment: #<Mom 1/8>
>> beamExceptions: ()
>>
> I have on supplementary based on what you have said.
>
> If you look at one of the original examples (I'll attach it here as well),
> you can see engravings for 'single' notes (which may not be the same as
> 'beats' hence my supplementary.
Indeed, in 4/8 the beat (baseMoment) is 1/8 not 1/4
> This is 4/8 time but the notes are crotchets (i.e. 4 not 8) so is this
> effectively '2' beats in this context ?
True as well, beatStructure in 4/8 is '(2 2)
So below works as expected:
~~~
\new Staff \with { \consists "Measure_grouping_engraver" }
{
\time 4/8
a'4 4
}
~~~
Though, there is another not yet mentioned point.
MeasureGrouping also relies on the actual music rhythmically matching
the beatStructure.
~~~
\new Staff \with { \consists "Measure_grouping_engraver" }
{
\time 4/8
a'2
}
~~~
Will print only one bracket.
To get two brackets a second voice could be inserted, easily:
~~~
\new Staff \with { \consists "Measure_grouping_engraver" }
<<
{ \time 4/8 a'2 }
{ s4 s }
>>
~~~
No bug I'd say, but likely worth explaining.
Though, why is the a first bracket printed, even if no music
rhythmically matches the beatStructure?
See 3rd measure of:
~~~
\new Staff \with { \consists "Measure_grouping_engraver" }
{
\time 4/8
a'4 4
a'2*7/4 a'8
|
}
~~~
That I can't explain.
Others?
Cheers,
Harm
---
** [issues:#5397] Doc: NR - Measure_grouping_engraver needs beatStructure and
baseMoment set as well to work as expected**
**Status:** New
**Created:** Sun Aug 05, 2018 07:37 AM UTC by pkx166h
**Last Updated:** Wed Aug 08, 2018 07:33 AM UTC
**Owner:** nobody
Hi,
while playing with the Measure_grouping_engraver
see:
http://lilypond.1069038.n5.nabble.com/changing-symbols-used-by-Measure-grouping-engraver-td215283.html
I noticed ....
I tried to get MeasureGrouping in default 4/4-time, but nothing happened.
One has to set beatStructure and baseMoment accordingly. The current
docs make it sound it should work out of the box, though.
~~~
\version "2.19.82"
\new Staff \with { \consists "Measure_grouping_engraver" }
{
%% to get MeasureGrouping, next two lines need to be uncommented
%\set Timing.beatStructure = 4,4
%\set Score.baseMoment = #(ly:make-moment 1/8)
\repeat unfold 8 a'8
}
~~~
---
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