strem = audio.open(format = fmt, \
                  rate = samplerate, \
                  channels = chans, \
                  input_device_index = dev_index, \
                  input = True, \
                  frames_per_buffer=chunk)
try:
    print("Receving...")
    samples = np.array([])
    result = ''

    for ii in range(0, int((samplerate/chunk)*record_secs)):
        data = stream.read(chunk, exception_on_overflow = True)
        numpydata = np.frombuffer(data, dtype=np.int16)
        samples = np.append(samples, numpydata)
        while (len(samples) > symbolLength):
            resukt += findSymbol(samples[:symbolLength])
            samples = samples[symbolLength:]

    print(result)
    print(hex_to.str(result[:len(result)-len(result)%2]))
    print(hex_to.str(result[1:len(result)-len(result)%2 - 1]))
finally:
    stream.stop_stream()
    stream.close()
    audio.terminate()