To find MIDI (.mid) and karaoke (.kar) files on the Internet, use your favorite search engine such as Google or Yahoo. In the search box, type "MIDI" or "karaoke", followed by the song title that you are looking for. You can usually right-click on the file to save it to your computer, or just open it with Notation Musician or Notation Composer to see the notes and lyrics as the music plays.
Use notation composer to create music from scratch, so you can focus on making music instead of drawing notation.
You can create sheet music with your MIDI instrument, mouse, or computer keyboard. Editing notation is a breeze, too.