The ShakeGuitar is an interactive music system for use with iPhone/iTouch that enables users to enjoy the simulated experience of guitar playing, even if they are musical novices.
Shaking the iPhone/iTouch with varying degrees of strength influences the level of guitar-melody difficulty, which smoothly changes in real-time from soft backing to heavy soloing.
Users can identify the difficulty level visually as the color of the guitar body changes corresponding to the level.
 

The ShakeGuitar is based on a melody morphing method developed by Masatoshi Hamanaka.
Further information can be found at
http://music.iit.tsukuba.ac.jp/

iPhone OS 3.0 and over only

ShakeGuitar Screenshots