#4966 the font name is Emmentaler, while Feta and Parmesan are two subsets of glyphs

[Federico Bruni]

This has been reported several times:
http://lists.gnu.org/archive/html/lilypond-user/2015-11/msg00594.html
https://lists.gnu.org/archive/html/lilypond-devel/2016-07/msg00196.html

Here's the summary made by Abraham. I highlighted point 4, since it would require a change in the source code:

1. There is no "Feta" font. It's called "Emmentaler", but it consists of
   two sub-sets of glyphs: "Feta" (the classical notation glyphs) and
   "Parmesan" (the ancient notation glyphs).

2. Since Emmentaler comes in 8 different optical sizes, the commands to
   load them only require the root name "emmentaler" to load them all.

3. The fonts are located, not in the system's font directory(s), but in the
   program's own font folder, typically
   "[LilyPondDir]/usr/share/lilypond/current/fonts/".

4. To use Emmentaler (or whichever is the main font, if using an
alternative) for a grob that supports the font-interface, it can be set via
the 'font-family property, but the value isn't 'emmentaler, it's 'feta
(sigh). It's a shorter name, which is nice, but it isn't technically
accurate.

1. In a \markup, the fonts can be accessed directly with the real font
   name, like "emmentaler-23".

2. In the NR, section A.8 is entitled "The Feta font", but the opening line
   starts out with "The following symbols are available in the Emmentaler
   font..."

In other words, there's some inconsistency floating around.