#2305 misalignment of grace notes in two staff-system

[Anonymous]

Originally created by: *anonymous

Originally created by: ma...@gregoriana.sk

Reported by Martin Straeten:
http://lists.gnu.org/archive/html/bug-lilypond/2012-02/msg00406.html

in a two staff system the placement of grace notes at the same beat is like
regular notes (the quaver gets more space to the main note than the
semiquaver)
So the grace note is optical separated from the main note. it looks like an
aftergrace instead of an grace note
Better: distance to main note is less than distance to preceeding note

example:
\version "2.15.28"
\relative c''{ <<
{ a16 g g g \grace a8 g4 }
{ a16 g g g \grace a16 g8 g16 g }
>>}

[Google Importer]

Originally posted by: k-ohara5...@oco.net

The intent is to show that the \grace a8 is played before the \grace a16
(otherwise they would both be \grace a16)

[Google Importer]

Originally posted by: dak@gnu.org

I don't really think so.  Without a slash, the grace note is rather certainly intended as an appogiatura.  You could write this as
\relative c''{ <<
{ a16 g g g \appoggiatura a8 g4 }
{ a16 g g g \appoggiatura a16 g8 g16 g }
>>}
and would still get the attached result which is clearly wrong since the execution will have the appoggiature, if any, obviously starting at the exact same point of time.

In my opinion, it would likely be best to format grace notes _independently_ from material in other voices and just stick them close to the note they belong to.  It does not really make sense to let them form note columns.  Without having to associate them with an actual global musical moment, iteration might get simpler (though Midi might still be tricky), and we have good reason to want to get rid of issue 34.