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"timidity.el" has been installed in ${PREFIX}/share/emacs/site-lisp/ .
If this place is not proper for your Emacs(en), copy it to load-path.

Ex. /usr/local/lib/xemacs/site-lisp
    /usr/local/share/mule/site-lisp

Add these line to your "~/.emacs"

(autoload 'timidity "timidity" "TiMidity Interface" t)
(setq timidity-prog-path "/usr/local/bin/timidity")

And then, type "M-x timidity" on Emacs. Enjoy!
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