1. An apparatus for playing music and displaying sheet music with synchronization, the apparatus comprising: an electronic appliance which supports an electronic book format, and which includes: (i) an audio output for playing an audio recording of a piece of music, the audio recording including sound-wave sampled audio; and (ii) a display for displaying the piece of music in notation form, the notation form having elements that can be identified, displayed, and highlighted, the elements representing discrete segments of the piece of music, each of the segments having a beginning and an end, the display of the piece of music including a first portion of the piece of music, program software for controllably playing the recording of the piece of music, and for displaying the piece of music, the software comprising: program software for highlighting a second portion of the piece of music, the second portion falling within the first portion as a subset thereof, wherein the highlighted second portion advances through the first portion; and display synchronization program software, for synchronizing the highlighted second portion in synchronization with the audio played from the audio output; wherein the program software for controllably playing and displaying supports an electronic book format.