Re: changing the length (height? positions? endpoints?) of an arpeggio

[Kieren MacMillan]

Hi Torsten,

> You can explicitly set an arpeggio's start/end positions by overriding the
> positions property.

See my response to Joram, and the bug (?) regarding that.

> this function can be used in a custom scheme function just subtracting a given
> amount from the lower value and adding the same amount to the upper value.

This is (a) fabulous, and (b) solves my problem perfectly (see modified 
snippet, below).

Thanks!
Kieren.

\version "2.19.80"

#(define (widen-arp grob)
  (let* ((pos (ly:arpeggio::calc-positions grob))
         (lower-corr 0.5)
         (upper-corr 0.5))
   (cons (- (car pos) lower-corr) (+ (cdr pos) upper-corr))))


upper = {
  \time 3/4
  <c'>2.\arpeggio
 \override Score.Arpeggio.positions = #widen-arp
  <c'>2.\arpeggio
}

lower = {
  \time 3/4
  \clef bass
  <c e g>2.\arpeggio
  <c e g>2.\arpeggio
}

\score {
  \new PianoStaff <<
    \new Staff \upper
    \new Staff \lower
  >>
  \layout {
    \context {
      \PianoStaff
      connectArpeggios = ##t
    }
  }
}
________________________________

Kieren MacMillan, composer
‣ website: www.kierenmacmillan.info
‣ email: address@hidden