MySong

MySong is a project from Microsoft researchers Dan Morris, Sumit Basu, and Washington State grad student Ian Simon. The program is made to "give many folks who would never even taste songwriting a great opportunity to just get a glimpse of music creation," according to the project's web site.

The program works by identifying the 12 standard musical notes in a sung melody, and then feeding those notes into an algorithm that has been trained by listening to 300 songs in varying genres and learning how to identify chords and melody fragments that work well together. The result is a series of musical accompaniments that users can adjust via sliders for "happy factor" and "jazz factor."

see <a class="link" rel="nofollow" href="http://research.microsoft.com/~dan/mysong/">http://research.microsoft.com/~dan/mysong/</a>