(autoload 'LilyPond-mode "lilypond-mode" "LilyPond Editing Mode" t)
(add-to-list 'auto-mode-alist '("\\.ly$" . LilyPond-mode))
+(add-to-list 'auto-mode-alist '("\\.ily$" . LilyPond-mode))
(add-hook 'LilyPond-mode-hook (lambda () (turn-on-font-lock)))