I used to play a violin in a school orchestra for several years, and I am an amateur piano player. By far the most frustrating thing I've encountered as a musician is, you have to turn pages in the middle of playing a song. This can be very inconvenient and interruptive of the music's flow, especially if you lose your place and have to re-adjust the music's position, page number, etc. My idea is, why not invent an LED display that has a foot pedal and that displays entire pieces of...