问隔离麦克风频率

EN

navigator.getMedia = navigator.getUserMedia || navigator.msGetUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia;


let ctx = new AudioContext();
let analyser = ctx.createAnalyser();
analyser.fftSize = 2048;


let gotData = (data) => {
  // visualize data
}

navigator.getMedia({
  audio: true
}, (d) => {
  let microphone = ctx.createMediaStreamSource(data);
  var biquadFilterHigh = ctx.createBiquadFilter();
  biquadFilterHigh.type = "highpass";
  biquadFilterHigh.frequency.value = 2000;
  biquadFilterHigh.gain.value = 25;

  var biquadFilterLow = ctx.createBiquadFilter();
  biquadFilterLow.type = "lowpass";
  biquadFilterLow.frequency.value = 5000;
  biquadFilterLow.gain.value = 25;

  microphone.connect(analyser);
  analyser.connect(biquadFilterLow)
  biquadFilterLow.connect(biquadFilterHigh)

  let scriptProcessor = ctx.createScriptProcessor();
  biquadFilterHigh.connect(scriptProcessor);
  scriptProcessor.connect(ctx.destination);
  scriptProcessor.onaudioprocess = gotData
  
}, () => {})