the invention provides an audio interface device and method utilizing a single audio jack connector for plugging into a three - wire analog microphone or a three - wire digital microphone , thereby reducing dimensions and production costs thereof and an electronic system using the same . the audio interface comprises an audio jack connector , having first to third contacts electronically connected with the three - wire microphone plugged thereinto ; and an audio processing device , detecting a type of the three - wire microphone plugged into the audio jack connector , outputting a clock signal to the three - wire microphone and receiving a digital audio signal from the three - wire microphone when the type is digital ; or receiving analog audio signals from the three - wire microphone when the type is analog .