这种设计将来自麦克风的音频输入信号线相结合，并把结果输出到输出信号线。将麦克风连接到MIC端口，一个音频源的LINE IN端口，扬声器/耳机的LINE OUT端口。-This design combines audio input from the microphone and line in signals and outputs the result to the line out signal. Connect a microphone to the MIC port, an audio