How to record audio using audioWorklet and AudioWorkletProcessor in javascript?

I have below logic to record (set samplerate = 16000 in AudioContext, mono channel recording by considering only one channel)

1. I set a parameter shouldRecord from AudioWorklet, and depending on that AudioWorkletProcessor will start putting data into buffer as below

  process(inputs, outputs, parameters) {
    const isRecordingValues = parameters.isRecording;
    //taking first input
    var input0 = inputs[0];
    var inputChannel = input0[0];
    if (isRecordingValues.length ===1){
      const shouldRecord = isRecordingValues[0] === 1;
      if (!shouldRecord && !this._isBufferEmpty()) {

        this._flush();
        this._recordingStopped();
      }

      if (shouldRecord) {
            this._appendToBuffer(inputChannel);
      }

    }
    return true;
  }

}

_appendToBuffer is as below:

  _appendToBuffer(value) {
    if (this._isBufferFull()) {
      this._flush();
    }

    // Here _buffer is of type Float32Array 
    this._buffer.set(value, this._bytesWritten);
    this._bytesWritten += value.length;
  }

2. In _flush method i am sending the contents of _buffer to AudioWorklet as below:

    var blob = this._exportWAV(buffer, this._bytesWritten);
    this.port.postMessage({
      eventType: 'data',
      audioBuffer: blob 
    });

Here buffer contains values between -1.0 to 1.0 .

3. I receive the data in AudioWorklet as ArrayBuffer object and i download it as Wave file. Irrespective of the size of the file i can open the file in Windows Media Player without error but it lasts less than a second and playback ends.

I believe i am doing something wrong in the process method and the data recorded in buffer is not in correct format.

What am i doing wrong here?

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