% !TEX TS-program = LuaLaTeX+se
\documentclass[11pt]{article}

\usepackage[autocompile]{gregoriotex}
\usepackage[T1]{fontenc}

\begin{document}
   %\grechangeglyph{Porrectus*}{*}{.alt}
   %\grechangeglyph{TorculusResupinus*}{*}{.alt}

    \includescore{example}

\end{document}