…also if you can’t sing
This is like Steinberg Cubase Extra Light. The application recognizes the beat to your voice and a eigthies synthi drum sound appears.
Please watch the whole video and you will not download it 
http://research.microsoft.com/en-us/um/redmond/projects/songsmith/index.html
The are using a Apple Mac to show the application. The apple brand is covered by flower pins.
Found at Read Write Web
http://research.microsoft.com/en-us/um/redmond/projects/songsmith/index.html