what's a basic speech dataset for a deep neural networks (with an example)? • /r/MachineLearning

I've never worked with audio data so I really have no idea on how to normalize it and feed it to my network, an example on github would be great, but its search engine returns nothing. I'm using theano and lasagne, but I just want to learn how to actually extract features from the speech samples. I found LITIS on the sub, but I heard it takes 16 gb of ram to process and I haven't found any implemented example.