[assignment];By using a computer device, a musical instrument performance can be obtained.;[Solution];The electronic musical instrument 25 can be connected and the computer 14 having the keyboard 14 and the display 15 are provided with various functions such as diagnosis, selection, teaching, evaluation and the like related to musical instrument performance. In the diagnostic function, the performance of the user is diagnosed by the user's answer to the presented task. In the selection function, an exercise song is selected according to the diagnosis result and a user's desire, or a practice method (teaching method) for an exercise song is selected. In the teaching function, an exercise plan is set up in accordance with the performance capability of the user and the desire of the user, and the performance practice by the user of the above selected exercise class is performed according to the plan. In the evaluation function, the performance practice by the user is evaluated and scored, and the evaluation and the scoring result are reflected in the progress of the exercise and the presented task, and are also used for correction of the diagnosis result.
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