问使用nodejs录制.wav会导致.wav文件被拉伸

EN

var mic = require('mic');

var micInstance = mic({
  rate: '48000',
  channels: '2'
});

var micInputStream = micInstance.getAudioStream();

var outputFileStream = new FileWriter('./test.wav', {
  sampleRate: 48000,
  channels: 2
});

micInputStream.pipe(outputFileStream);

micInstance.start();

setTimeout(function() {
  micInstance.stop();
}, 5000);