Re: Issue 694 in lilypond: Enhancement: arrowed heads for microtone accidentals

[lilypond]

Comment #10 on issue 694 by joseph.wakeling: Enhancement: arrowed heads for  
microtone accidentals
http://code.google.com/p/lilypond/issues/detail?id=694

Looking at the patches, they don't address the fundamental problem.  I  
don't know whether they really matter at this stage.

The problem is not the support for arbitrary fractional alterations of a  
pitch per se.  The problem is that Lilypond permits only one possible  
accidental for any given alteration of a pitch, whereas some microtonal  
notations (like the arrowed notation) can have two different accidentals  
for the same pitch alteration.

I'll try and write up an adequate description of the problems/concerns for  
the -devel list.  I did try and do this some time ago at:
http://lists.gnu.org/archive/html/lilypond-user/2009-04/msg00139.html

... but the discussion/feedback at the time didn't lead to an adequate  
solution.