| 摘要 |
PROBLEM TO BE SOLVED: To execute totally novel performance with performance sound. SOLUTION: A plurality of performance image data are stored, and whether a performance image switching command is output or not is determined based on a specific frequency component of the sound received by a microphone 102. When it is determined that the performance image switching command is output, performance image data different from performance images which can be currently displayed are displayed as performance images. COPYRIGHT: (C)2009,JPO&INPIT
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