Abstract: There is disclosed herein an electronic digital system for allowing encoding and storage of note value and time value for one or more musical instruments and which, upon playback, controls a light display to indicate to the musician the notes to be played and their time value. The system is particularly described for use with guitars, and similar instruments, and has an X-Y display to indicate, for example, both the particular string and the note to be played, as well as the time value of the note. In addition, the system will accommodate a plurality of such musical instruments to thereby enable display of the notes to be played, and their time values, for all of the instruments simultaneously. The system includes a keyboard for entering note value and note timing for each of one or more instruments, and a memory for storing data bits indicative of the notes for each instrument and the timing thereof.