Only one slight rider to Mark's comments above. According to the documentation at the site, the tune-o-tron uses abc2ps rather than abcm2ps. The differences may not matter but we have found discrepancies all the same. A couple I can think of are that abc2ps aligns words under grace notes and seems to have some requirement of the tilde (~) symbol even if an ornament is given by {}. Minor differences I know but Guido's manual will be based on abcm2ps.

If you do want to try the abc route (I'm a big fan BTW), another resource is this one put together by Steve Mansfield.