This was posted twice. We kept this thread as the earlier of the two, but changed the URL to the more explanatory post. The other URL is http://www.eecs.qmul.ac.uk/~sturm/research/RNNIrishTrad/inde... and actually plays the music. The other HN thread was https://news.ycombinator.com/item?id=10069007, but we moved the comments here.