Musical tone generation method

Calculating a change amount of the coordinate data as a vector, for corresponding to the calculated vector and outputs the musical tone generating a musical tone data to obtain freely tone without being limited by the size and position of the coordinate plane to enter be able to. Tone generation apparatus 10 includes a coordinate input device 12 for inputting coordinate data, the main controller 14, an acoustic device 16, a display device 18. The main controller 14 includes a motion calculation unit 20 that calculates a vector of two of the coordinate data input back and forth at a predetermined time interval, the tone data generating unit 22 for generating a musical tone data based on the calculated vector If, based on the coordinate data, it combines the function of generating the function display color data to generate the musical instrument data, and musical instrument data generating unit and the display color data generating unit 24, a data transferring and storing unit 26, the tone data It comprises a MIDI sound source 28 to be controlled.