func recordWav() string {

	audioFileName := "temp.wav" //os.Args[1]

	fmt.Println("Recording. Press ESC to quit.")

	waveFile, err := os.Create(audioFileName)
	chk(err)

	// www.people.csail.mit.edu/hubert/pyaudio/  - under the Record tab
	inputChannels := 1
	outputChannels := 0
	sampleRate := 44100

	// init PortAudio

	portaudio.Initialize()
	//defer portaudio.Terminate()

	encoder := wav.NewEncoder(waveFile, sampleRate, 16, 1, 1)

	format := &audio.Format{
		NumChannels: 1,
		SampleRate:  44100,
	}

	data := make([]int, 4096)

	buf := &audio.IntBuffer{Data: data, Format: format, SourceBitDepth: 16}
	buf32 := buf.AsFloat32Buffer()

	stream, err := portaudio.OpenDefaultStream(inputChannels, outputChannels, float64(sampleRate), 64, buf32.Data)
	chk(err)

	chk(stream.Start())

	for start := time.Now(); time.Since(start) < time.Second*7; {
		chk(stream.Read())

		log.Println("Recording...")

		// write to wave file
		err := encoder.Write(buf)
		chk(err)
	}

	stream.Close()
	portaudio.Terminate()

	return audioFileName
}