title: get the amplitude data from an mp3 audio files using python
body: <p>I have an mp3 file and I want to basically plot the amplitude spectrum present in that audio sample.
  I know that we can do this very easily if we have a wav file. There are lot of python packages available for handling wav file format. However, I do not want to convert the file into wav format then store it and then use it.
  What I am trying to achieve is to get the amplitude of an mp3 file directly and even if I have to convert it into wav format, the script should do it on air during runtime without actually storing the file in the database.
  I know we can convert the file like follows:</p>
  
  <pre><code>from pydub import AudioSegment
  sound = AudioSegment.from_mp3("test.mp3")
  sound.export("temp.wav", format="wav")
  </code></pre>
  
  <p>and it creates the temp.wav which it supposed to but can we just use the content without storing the actual file?</p>