\documentclass[12pt]{article}
\usepackage{mtxlatex} % usually not installed
\thispagestyle{empty}

\mtxlatex

% compile with:
% musixtex sample-mtx scale sample-latexmtx.ltx

\begin{document}

This \LaTeX\ document includes music written in M-Tx. The
\texttt{mus} environment includes music inline: 
\begin{mus} \input{scale.tex} \end{mus} , while the 
\texttt{excerpts} environment is used for longer excerpts:

\medskip

\begin{excerpts}
  \input{sample-mtx.tex}
\end{excerpts}

\end{document}