MusiXTeX is a set of TeX macros to typeset polyphonic, orchestral or
polyphonic music.  This software is not recommended for users that are
familiar with TeX.

MusiXTeX is documented in lib/texmf/documentation/musixtex.tex. This
file must be processed with LaTeX and musixflx:
  latex  musixdoc
  musixflx musixdoc
  latex  musixdoc
  makeindex musixdoc.idx
  latex  musixdoc
  makeindex musixdoc.idx
  latex  musixdoc

Some examples are provided in lib/texmf/documentation/musixtex.examples
for instance, to typeset the file 'traeumer.tex' type:
  musixtex traeumer
  musixflx traeumer
  musixtex traeumer

WWW: http://icking-music-archive.org/software/indexmt6.html