Patent ID: 7194686

Claim:
A method for editing performance data using a computer system having a display, said method comprising the steps of: controlling the computer system to display a plurality of layers on a screen of the display, wherein each of said plurality of layers is assigned to a different type of articulation to be added to a musical tone to be generated based on the performance data; providing a display instruction for controlling the display setting of any one of said plurality of layers, said display setting being one of display mode and non-display mode; in response to the display instruction, controlling the computer system to place said any one of the layers in the display mode or the non-display mode; and in response to a user instruction, attaching an execution icon at a prescribed position onto one of said plurality of layers that is displayed on the screen of the display, wherein said attached execution icon represents execution-related data for adding, to the musical tone to be generated, a predetermined type of articulation to which said one of said plurality of layers is assigned, wherein said step of attaching the execution icon causes the corresponding execution-related data to be incorporated into the performance data being edited.