\ifx\mxversion\undefined
  \input musixtex
  \input musixcpt
  \input musixsty
\fi
\newif\ifOrgue
\Orguefalse
\newif\ifFlute
\Flutetrue
\newif\ifOboe
\Oboefalse
%\def\Quer{z} % define Querfl\"ote 
%
%
\input marcon1.tex
\eject
\input marcon2.tex
\eject
\input marcon3.tex
\bye