Patent ID: 7674964

Claim:
An electronic musical instrument comprising: a keyboard including a plurality of individual keys, arrayed in a first direction, for a manual performance where individual musical notes are manually playable; an automatic performance device for playing an automatic performance based on input automatic performance data during the manual performance; a detecting device for detecting respective key depression velocities of the individual keys being manually played; an indicator device having a plurality of lightable bar-graphic indicators each for one of said individual keys in the keyboard, the bar-graphic indicators being arrayed side by side in said first direction, each of said bar-graphic indicators being elongate in a second direction which is perpendicular to said first direction; and an indicator controlling device for controlling lighting of said bar-graphic indicators respectively in accordance with the automatic performance data and said detected key depression velocities of the individual keys manually played, wherein the indicator controlling device controls lighting of the bar-graphic indicators during the manual performance so that the bar-graphic indicator associated with a manually depressed key concurrently displays both a first visual representation of a key depression velocity of the respective manually depressed key in the keyboard concurrently with the key depression and a second visual representation of a corresponding note played by the automatic performance concurrently with the respective manually depressed key, and wherein the bar-graphic indicator corresponding to a note of a manually depressed key displays a first length extending along the second direction that represents the first visual representation of the velocity of the note corresponding to the manually depressed key or a second length also extending along the second direction that represents the second visual representation of the tone level of a corresponding note played by the automatic performance, or both the first and second lengths overlappingly along the second direction if the corresponding note is concurrently played manually and by the automatic performance.