Re: Notehead collisions, accidentals

[Mats Bengtsson]

Quoting Mark Knoop <address@hidden>:

> Hi all,
>
> This is really about three issues, but they're related, so bear with me
> please.
>
> 1. There seems to have been a decision made at some point to merge
> note heads in some cases (see collision-head-chords.ly in the
> regression tests and the second chord in the example code below). I
> personally find this ugly and cannot find an example in my library of
> published music where an engraver has taken this same decision. I
> prefer the forked stem solution - see the attached picture. I would be
> interested in others' opinions on this, and advice as to any possible
> workarounds.

Unfortunately, there isn't any support for forked stems in LilyPond
at the moment, but the feature has been requested a number of times
over the years.

> 2. Forcing the display of all accidentals with ! demonstrates a
> collision bug - perhaps forced accidentals are bypassing the accidental
> collision code?

If you try
<fis' fes'>4
you will realize that it doesn't have anything to do with forced
accidentals per se. Rather, it seems like a bug that you don't
get a natural if you do
<fis f>

> 3. These points are both related to a feature request for a new
> accidental style which is common in quite a lot of contemporary music.
> That is, accidentals, including naturals, before _every_ note,
> excepting immediate repetitions.

See the section on Automatic Accidentals. You probably want something
close to
#(set-accidental-style 'forget)
however, the tricky aspect is the "except immediate repetitions"
which isn't supported as far as I know.


  /Mats