title: How to train an lstm for speech recognition
body: <p>I'm trying to train lstm model for speech recognition but don't know what training data and target data to use. I'm using the <a href="http://www.openslr.org/12/" rel="noreferrer">LibriSpeech dataset</a> and it contains both audio files and their transcripts. At this point, I know the target data will be the transcript text vectorized. As for the training data, I was thinking of using the frequencies and time from each audio file (or MFCC features). If that is the correct way to approach the problem, the training data/audio will be multiple arrays, how would I input those array into my lstm model? Will I have to vectorize them? </p>
  
  <p>Thanks!</p>