Re: Controlling stem lengths in a global way

[Aaron Hill]

On 2022-08-15 3:11 pm, Knute Snortum wrote:
> I am engraving a piece where there are many groups of 16th notes where
> the first note is normal size and the rest should look like grace
> notes.  I'm using \scaledDurations, \magnifyMusic and \normalsize to
> do this, but I'm running into a systemic problem: the stems of the
> normal size notes are mostly too short (they'd be fine if they were
> grace notes).  To get around this I'm using beam position overrides
> and tweaks, but this gets tedious quickly.  Is there a) a systemic way
> to tweak the stem lengths, and/or b) better way for me to do this?
>
> %%%
> \version "2.22.2"
> \language "english"
>
> ns = \once \normalsize
>
> % Short stems on the normalsize notes
> \relative d'' {
>   \magnifyMusic #2/3 {
>     \scaleDurations 2/3 {
>       \ns d16 f, g c, f g  \ns c e, g c, e g
>       \ns c d, g c, d g  \ns c e, g c, e g |
>     }
>   }
> }
>
> beamPositionA = \tweak Beam.positions #'(4 . 2) \etc
> beamPositionB = \override Beam.positions = #'(3 . 1)
>
> % Need to tweak or override many, many notes
> \relative d'' {
>   \magnifyMusic #2/3 {
>     \scaleDurations 2/3 {
>       \ns \beamPositionA d16 f, g c, f g  \ns \beamPositionB c e, g c, 
> e g
>       \ns c d, g c, d g  \ns c e, g c, e g \revert Beam.positions |
>     }
>   }
> }
> %%%
>
> --
> Knute Snortum

Would \offsetting positions make more sense?  For instance, you could do 
this:

%%%%
ns = \once {
  \normalsize
  % Stem needs a little bit more length
  % to counteract magnifyMusic...
  \offset positions #'(1 . 0) Beam
}

\relative d'' {
  \magnifyMusic #2/3 {
    \scaleDurations 2/3 {
      \ns d16 f, g c, f g
      \ns c e, g c, e g
      \ns c d, g c, d g
      \ns c e, g c, e g |
    }
  }
}
%%%%

This does assume that the amount of lengthening required is uniform.


-- Aaron Hill