isabled = true;
        start.disabled = false;
        monitorGain.disabled = true;
        recordingGain.disabled = true;
        numberOfChannels.disabled = true;
        encoderBitRate.disabled = true;
        encoderSampleRate.disabled = true;

        var options = {
          monitorGain: parseInt(monitorGain.value, 10),
          recordingGain: parseInt(recordingGain.value, 10),
          numberOfChannels: parseInt(numberOfChannels.value, 10),
          encoderSampleRate: parseInt(encoderSampleRate.