PROBLEM TO BE SOLVED: To provide a music performance learning device that enables the learner to be aware of the relative strength of performance actions during practices.SOLUTION: An electronic keyboard instrument 1 indicates on a relative strength indicator the required strength of a key touch stroke at, for instance, a point of time t6 being one stroke ago before the sound issuance timing of a point of time t7. As the performer is thereby enabled to know the relative strength of the key touch stroke in display and sound before the sound issuance timing, he or she can practice while keeping in mind the relative strength of the key touch stroke.SELECTED DRAWING: Figure 6
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