I am trying to use \widetilde with a custom font called LTL fonts http://theory.stanford.edu/~matteo/ltlfonts/
From its description:
The font is distributed in outline Type 1 format, with associated TeX (TFM), Adobe (AFM), and Microsoft (PFM) font metrics.
The thing is when I use \widetilde{\LTLcircle}, it appears like

Apparently the tilde is too close to the circle, and I would like to raise it a bit.
I found a related question about how to lower the tilde, unfortunately I can't find the way to "raise" it.

\LTLcirclewith for example$\widetilde{\raisebox{-2pt}{\LTLcircle}}$, but I am not sure whether it would be satisfactory. – Harold Cavendish Aug 04 '11 at 22:34