Small Caps not working for non-LaTeX font

Question

I'm using a special font called 'Brandon Grotesque' (it has to be exactly that one) for a presentation based on the Beamer class.

When trying to get small caps output, it doesn't work. I'm using LuaLatex as a compiler.

In general I'm aware of the possibility that the specific font might not contain small caps, but when using the font in e.g. Powerpoint, the small caps work.

MWE:

\documentclass[12pt]{beamer}
\usepackage{xltxtra}

\setmainfont[BoldFont={Brandon Grotesque Bold},Renderer=Basic]{Brandon Grotesque}
\setsansfont{Brandon Grotesque}
\renewcommand{\familydefault}{\sfdefault}

\begin{document}

\begin{frame}[t]
Normal Output
\textsc{Small Caps}
\textbf{Bold Text}
\end{frame}

\end{document}