Music scanner

I'm not into sound and music, but this looks really interesting:

http://www.macworld.com/2004/09/reviews/musicrec/index.php/?lsrc=mcrss-0904

Quote:

People who’ve worked with a scanner and an optical character recognition (OCR) program know how difficult it can be for computers to accurately recognize the printed word. That problem is compounded in OCR applications for scores (musical notation). The program must not only recognize text in the form of lyrics, titles, and dynamic markings, but also determine a note’s pitch by its position on a musical staff, rhythmic value, or accidental sign (sharp, flat, or natural).