[Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] #5258 Vertical

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[Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] #5258 Vertical breve rest position in TabStaff/RhythmicStaff

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Mon, 15 Jan 2018 07:25:22 -0000

This comment by Benkő Pál asks whether breve/longa rests in TabStaff should go from line to line.

Gould doesn’t mention tablature notation at all but she states (quoted from the german translation)

Die doppelte Pause erstreckt sich über einen ganzen Zwischenraum und hat
die gleiche oder (häufiger) die halbe Länge einer ganzen oder halben Pause

which translates to

The breve rest extends across a whole space and has the same or (more commonly) half the width of a whole or half rest.

This would imply that we could not use the breve/longa/maxima rest glyphs from the font whenever staff-space is changed but would have to draw rectangles.

[issues:#5258] Vertical breve rest position in TabStaff/RhythmicStaff

Status: Started
Created: Sat Jan 13, 2018 04:47 PM UTC by Malte Meyn
Last Updated: Sun Jan 14, 2018 05:53 PM UTC
Owner: Malte Meyn
Attachments:

breve_rests.png (26.0 kB; image/png)
gould_breve_rests_oneline.png (27.9 kB; image/png)

According to Gould breve rests should hang from a one line staff (RhythmicStaff) as semibreve rests do. Also, there is a comment in multi-measure-rest.cc saying

// Staff position is somewhat icky regarding its definition for
// compatibility reasons.  It is intended to be the baseline of
// a breve rest.  However, when the staff space is more than
// single space (like with tablature), it looks better if all
// rests are actually hanging.  So staff position, in reality,
// is the semi-breve position - 2.  Everything else is
// calculated from there.

This confirms what Gould writes. But the code applies only to MMRs with a measure-count > 1.

That leads to inconsistent behaviour: MultiMeasureRest breve glyphs hang, but not for single measures. Rest breve glyphs don’t hang. Instead, all breve rests should hang.

\version "2.19.80"

music = {
  \compressFullBarRests
  r1 R1 R\breve
  \time 4/2
  r\breve R\breve R\longa
  \time 8/2
  r\longa R\longa
}

\new TabStaff \with { \tabFullNotation } \music

\new RhythmicStaff \music

\new Staff \music

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