title: PyAudio - Convert stream.read into int to get amplitude
body: <p>I'm trying to record audio and simultaneously print the amplitude of the recorded signal. So I'm saving all datas in stream.read. But when I try to print them, I have a string of bytes and no integers. I would like to know how to convert these signs in order to get amplitude.</p>
  
  <p>This is my code :</p>
  
  <pre><code>import pyaudio
  import wave
  
  CHUNK = 1024 
  FORMAT = pyaudio.paInt16
  CHANNELS = 1 
  RATE = 44100 
  RECORD_SECONDS = 5
  WAVE_OUTPUT_FILENAME = "output.wav"
  
  p = pyaudio.PyAudio()
  
  stream = p.open(format=FORMAT,
                  channels=CHANNELS,
                  rate=RATE,
                  input=True,
                  frames_per_buffer=CHUNK) 
  
  print("* recording")
  
  frames = []
  
  for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
      data = stream.read(CHUNK)
      frames.append(data) # 2 bytes(16 bits) per channel
  
  print("* done recording")
  
  stream.stop_stream()
  stream.close()
  p.terminate()
  
  for data in frames:
      print(data)
  </code></pre>
  
  <p>And this is what I obtain :</p>
  
  <blockquote>
  <pre><code>       ����#  ����
            
   !$
            
  
                   ��  ���� ��������������������������
             ������  �� ��                                           
  ��
  
     �� ������ ����������������������������
                              ��    
                                       ����                                                
  </code></pre>
    
    <p>������������������������������������������������������������������</p>
    
    <p>���������
             ���������������
                                    
                                                 </p>
    
    <p>%  �� ��(��)����,����.����%����#��
                                     ��   �� �����������������������</p>
  </blockquote>