title: Letter Speech Recognition using octave
body: <p>I am trying to recognise all the letters of the alphabet from audio files.
  The audio files (26) are my recordings of speaking the alphabet.
  So I am trying to implement a speech to text program, where the input is my voice speaking a letter which I am trying to predict what is it.</p>
  <p>I guess I will have to do some kind of convertion of the sound like fft, spectrograms ex. Collect some info of the sound like zero-cross-rate, max frequency etc..
  And then try to find the most similar one with something like euclidean distance.</p>
  <p>I am trying doing this only using octave.
  I don't want the full code, I just want to know where to start. How would you do it?</p>