Did you ever get a littly diddy in your head, or a melody from a tune you remember as a child? Wouldn’t it be cool if you could use your keyboard to play a few of the notes you remember, and then have a search engine bring you suggestions for what the song or composition is? I have a jingle in my head right now, but I have no idea how to get that information out to you guys? I suppose I could figure out the actual notes and then put it in musical notation, but that is a little honerous.
I would not be surprised to see this sort of technology emerge in the near future.
Actually, there is such a thing: http://www.midomi.com/. Another, http://www.shazam.com/, has an app for your smart phone. No idea how well these work.
I’m pretty sure there’s an iPhone app that will do that, for the most part. Play a few notes into the iPhone’s microphone and it claism to find the title and artist.