| 摘要 |
PROBLEM TO BE SOLVED: To easily inspect the signal levels being inputted and outputted. SOLUTION: A karaoke device 100 is provided with an input terminal Tin, to which analog signals are inputted from the external, and an output terminal Tout, from which analog signals are outputted to the external. The terminal Tin is connected to the devices such as an external device 200 that outputs analog signals. The terminal Tout is connected to the devices such as an amplifier/speaker 300 that generates sounds based on the analog signals. Then, the device 100 detects the levels of analog signals inputted from the device 200 and the levels of analog signals outputted to the amplifier/speaker 300 as digital data and the inspection of the signal levels is conducted based on the detection values. Note that diagnosis is made to determine whether there exists a failure in the path of analog signals or not based on the inspection result and the signal levels are adjusted accordingly. |
