Re: feathered beam calculations

[Reggie]

Vaughan McAlley wrote
> On Fri, 15 Dec 2017 at 19:34, N. Andrew Walsh <

> n.andrew.walsh@

> >
> wrote:
> 
>> Hi List,
>>
>> I'm trying to use the \featherDurations command on a brief passage:
>>
>> \relative c' {
>> a,,^\markup { \italic "subito meno mosso" }\( b cis dis eis8\)
>>  \override Beam.grow-direction = #LEFT
>>   \featherDurations #(ly:make-moment 2/1)
>>  { a,32[\( b cis dis eis]\)\fermata }
>>  \override Beam.grow-direction = #'()
>>  < a, cis e >16 < a cis e >
>>
>> }
>>
>> What I want is for that feathered group on the fourth line to occupy the
>> duration of exactly one eighth note. As there are five notes, I'm
>> struggling with the math, and thus what to put after ly:make-moment.
>>
>> Can you advise as to what the numbers should be?
>>
>> Cheers,
>>
>> A
>>
>>
> I just consulted one of the two feathered beams I’ve written this century.
> I was initially a bit baffled about the number I had chosen. It turns out
> that number is just for MIDI playback (correct me if I’m wrong) and you
> just put the notes inside a tuplet and omit the number. For typesetting
> purposes the total length of the unaltered notes is what counts:
> 
> \version "2.18.2"
> 
> \relative d {
>   \clef bass
>   \time 4/4
>   d2 e4~
>   \override Beam.grow-direction = #RIGHT
>   \featherDurations #(ly:make-moment 3/4)
>   {
>     \once \override TupletNumber.stencil = ##f
>     \tuplet 5/4 { e16 [ dis-. ais-. fis'-. d-. ] } |
>   }
>   \revert Beam.grow-direction
>   cis1 |
> }
> 
> Vaughan
> 
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See the problem. How do you change the amount of "beams" you feather when
the amount of notes is example 3. You need to just forget it? 3  beams are
not possible?

\relative d {
  \clef bass
  \time 4/4
  d2 e4
  \override Beam.grow-direction = #RIGHT
  \featherDurations #(ly:make-moment 3/4)
  {
    \once \override TupletNumber.stencil = ##f
    \tuplet 3/4 { c16[ d e] } |
  }
  \revert Beam.grow-direction
  cis1 |
}




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