demo.tex

\documentclass[a4paper,12pt]{article}

%\usepackage{mtxlatex}
\usepackage[margin=2cm]{geometry}
\usepackage{ebgaramond}
\usepackage[autocompile]{gregoriotex}
\usepackage{lyluatex}
\usepackage[generate]{abc}
%\mtxlatex

\title{{\LaTeX} music typesetting demo}

\author{Laércio de Sousa}

\begin{document}
\maketitle

\section{Gregorio\TeX}

Example of GregorioTeX music typesetting:
\gregorioscore{an--adorna_thalamum--triplex}

\section{LilyPond}

Example of LilyPond music typesetting:
%\lilypond{c d e f g a b c}
\lilypondfile[pass-fonts,current-font-as-main]{lilypond-example}

\section{ABC}

Example of ABC music typesetting:
\abcinput{abc-example}

%\section{M-Tx (Musix\TeX)}

%Example of MusixTeX M-Tx typesetting:

\newcommand*{\addFileDependency}[1]{
  \IfFileExists{#1}{}{\typeout{No file #1.}}
}

\newcommand{\includeMTxPages}[1]{%
  \addFileDependency{#1.pdf}%
  \IfFileExists{#1.pdf}{\includepdf[pages=-]{#1.pdf}}{}
}

\newcommand{\includeMTxAsGraphics}[2][]{%
  \addFileDependency{#2.pdf}%
  \addFileDependency{#2-crop.pdf}%
  \IfFileExists{#2-crop.pdf}{%
    \bigskip\includegraphics[#1]{#2-crop.pdf}\bigskip%
  }{}%
}

\newcommand*{\includeMTx}[1]{%
  \IfFileExists{#1.tex}
  {\input{#1}\typeout{Yeah we have #1.tex}%
    {\addFileDependency{\jobname.mx2}}
  }
  {Oops sorry \typeout{No file #1.tex.}}
  \addFileDependency{#1.tex}%
}

%\begin{mus}
%  \includeMTx{mozart-riff-in-c}
%\end{mus}

\end{document}