[TOC] ## 只采集音頻 創建存放音頻的標簽 ``` <div> <audio autoplay controls id="audioplayer"></audio> </div> ``` 獲取音頻的標簽 ``` var audioplayer = document.querySelector('audio#audioplayer'); ``` 在gotMediaStream函數中添加音頻流： ``` function gotMediaStream(stream) { audioplayer.srcObject = stream; return navigator.mediaDevices.enumerateDevices(); } ```