A system comprising means for receiving a first input from an electronic device, said first input pertaining to performance of music by a user, means for receiving a second input, said second input pertaining at least to music intended to be performed by the user; and a comparison module software executing...http://www.google.com.tw/patents/US20100313736?utm_source=gb-gplus-share專利 US20100313736 - System and method for learning music in a computer game
