如何在webrtc中提高麦克风增益

navigator.mediaDevices.getUserMedia({ audio: true })
  .then(function(stream) {
    // 获取麦克风设备流
    var audioTracks = stream.getAudioTracks();
    if (audioTracks.length > 0) {
      var audioTrack = audioTracks[0];
      var constraints = audioTrack.getConstraints();
      
      // 调整麦克风增益
      constraints.volume = 0.8; // 设置增益值为0.8
      
      // 应用增益设置
      audioTrack.applyConstraints(constraints)
        .then(function() {
          console.log("麦克风增益已调整");
        })
        .catch(function(error) {
          console.error("无法调整麦克风增益：" + error);
        });
    }
  })
  .catch(function(error) {
    console.error("无法获取麦克风设备：" + error);
  });