Computer-readable storage medium having stored therein music performance program, music performance apparatus, music performance method, and music performance system

摘要

A game apparatus repeatedly calculates a gravity center position based on load values detected by respective load sensors of a load controller. The game apparatus sequentially reproduces each of measures of a musical piece by reproducing a next measure when the gravity center position moves beyond a reference line. In this case, the game apparatus changes a reproduction sound volume in accordance with the gravity center position and a speed at which the gravity center moves.