| 摘要 |
<p>In a structure for setting an audio signal outputted by an audio information processing part to a signal of a kind corresponding to the detected results of switches, when a plug having the length of a signal side contact longer than the standard of an RCA pin plug is connected to RCA pin jacks, the switches are respectively attached to positions to be operated by the signal side contact of the plug and not to be operated by the signal side contact of the RCA pin plug. When the operating states of the switches show that the plug is not connected to the RCA pin jacks, the audio signal outputted by the audio information processing part is set to a signal of a kind set by a user.
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