Help with changing notehead glyph

[James Lowe]

Hello,

I am trying to use one of the note glyphs as listed in the NR section

http://lilypond.org/doc/v2.13/Documentation/notation/the-feta-font#special-
notehead-glyphs

I have tried a combination of \overrides but cannot seem to get the glyph
I'd like - in fact nothing changes

So for example in a \context { \Voice { }} I added

        \override NoteHead #'glyph-name = #'"noteheads.u2do"



But it didn't do anything (I didn't get an error, so at least I know that
my formatting of the command is correct if not the interface/grob)


I also looked in font-table.ly (which is where the page is generated from)
it wasn't obvious what to use.

Can anyone point me in the right direction?

Thank you.

James