Is there a good search engine to find music based on the melody or score?

I frequently find myself wondering what a certain song is for which I can hum the tune and I am wondering if there is a search engine of sorts where I could write out as much of the score as I know in music notation and search for it to get the title/author/lyrics: A google of sorts for music where instead of searching with words you would write out the notes.

This would be particularly helpful with classical music because their are no words to remember and search for, so unless you know the title you are stuck and remembering titles such as sonata __, minuet __, or prelude __ gets pretty confusing after awhile.

Based on the popularity of the identify-this tags I am guessing a lot of people both on and off this site would find this useful

Is there a good search engine to find music based on the melody or score?

I frequently find myself wondering what a certain song is for which I can hum the tune and I am wondering if there is a search engine of sorts where I could write out as much of the score as I know in music notation and search for it to get the title/author/lyrics: A google of sorts for music where instead of searching with words you would write out the notes.

This would be particularly helpful with classical music because their are no words to remember and search for, so unless you know the title you are stuck and remembering titles such as sonata __, minuet __, or prelude __ gets pretty confusing after awhile.

Based on the popularity of the identify-this tags I am guessing a lot of people both on and off this site would find this useful