| 摘要 |
A gaming machine comprises a sound signal output device, a plurality of signal buses, a changeover switch, a plurality of attenuators, an adder and a speaker. The sound signal output device outputs plural sound signals in parallel. The signal buses are adapted to input the plural sound signals outputted from the sound signal output device therein and transmit the sound signals. The changeover switch switches an operating state between an ON state allowing the sound signals to be inputted into the signal buses and an OFF state prohibiting the sound signals from being inputted into the signal buses. The attenuators attenuate the sound signals transmitted through the signal buses. The adder adds all the sound signals of the signal buses attenuated by the attenuators. The speaker converts the sound signal added in the adder into a sound wave and turns up the sound wave.
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