| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem of annoying persons around with loud game sound continuously made in spite of no game being played on a game board when a player goes away from the game board during a BB game. SOLUTION: Whether 30 seconds or more have passed since the start timing of the last game is discriminated (step 172). In the case 30 seconds or more have not passed, the volume of the game sound is set to the maximum (step 173). Then, whether 60 seconds or more have passed since the start timing of the last game is discriminated (step 174). In the case 60 seconds or more have not passed, the volume of the game sound is lowered by one stage to make the sound (step 175). Further, whether 90 seconds or more have passed since the start timing of the last game is discriminated (step 176). In the case 90 seconds or more have not passed, the volume of the game sound is further lowered by one stage to make the sound (step 177). In the case 90 seconds or more have passed, the game sound is silenced (step 178).
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