Microsoft’s Songsmith is an app that is designed to let you makes songs by singing into your Windows computer:

Songsmith generates musical accompaniment to match a singer’s voice. Just choose a musical style, sing into your PC’s microphone, and Songsmith will create backing music for you. Then share your songs with your friends and family, post your songs online, or create your own music videos.

For people that do know how to write music, Microsoft says:

Songsmith is for you too. Songwriters can use Songsmith as an “intelligent scratchpad” to work with new melodies, quickly turning your scratch recordings of new ideas into richer, deeper explorations. Musicians can also play instruments right into Songsmith, instead of singing.

This might be an interesting product, but their promotional video tries your patience, and the app’s graphic design is pretty horrible. That may be enough to keep people away. 

Let me know what you think!