Parenthesized note, without taking space...

[Alberto Simões]

Hello

I know, the subject is not clear.
And I am not sure if I can make me clear, but let me try.

My time is 2/4. Thus a half note (minim) will take the entire bar.
But I have an optional note (eight of duration) between parenthesis.

I know how to write the note in parenthesis (\parenthesize), but I do
not know how to make this second note appear as if the previous one has
just half of its duration.

In ascii art:


    |     |
   O    (X)

Thank you :)
Alberto
-- 
Alberto Simões - Departamento de Informática - Universidade do Minho
                 Campus de Gualtar - 4710-057 Braga - Portugal