I can't find "octave music language" anywhere on Google either. But maybe the commentor was thinking of abc-mode and misspoke? That one is for a music language.

I can't find "octave music language" anywhere on Google either. But maybe the commentor was thinking of abc-mode and misspoke? That one is for a music language. http://www.emacswiki.org/emacs/AbcMode http://www.emacswiki.org/emacs/AbcMode