If you want to go the LaTeX way you can use the following boilerplate
code:
\documentclass[a4paper]{article}
\usepackage[
% set absolute paper dimensions *including bleeding area*
% in this example A4 plus 6mm (*2)
width=22.2truecm, height=30.9truecm,
% use any combination of these options to add different cut markings
cam,
axes,
%frame,
%cross,
% set the type of TeX renderer you use
pdflatex,
% center the contents
center
]{crop}
% More info with "texdoc crop"
\usepackage{pdfpages}
\begin{document}
\includepdf[pages=-]{path/to/score.pdf}
\end{document}