[brutuscat]

This seems very related to this http://www.youtube.com/watch?v=ZmNOAtZIgIk speak by Andrew Ng. It is a 40min speak, but he explains very simply how all this works for images and some examples about the audio case. It is incredible how using this deep learning techniques we can teach this "neural networks" to recognize such complicated patterns. It is like reverse engineering the brain's algorithms.

BTW I took his Coursera's course about Machine Learning and it was great! I also recommend it A LOT to gather basic ML knowledge.

[JabavuAdams]

Are you still able to access the course materials? I took the course as well (and enjoyed it!) but I'd like to access the PDFs, especially.

[brutuscat]

Yes I have downloaded all the PDFs, email me (check my profile) I will share it via Dropbox for you ;)