https://maraoz.com/2016/02/02/abc-rnn/
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Similar projects:
Music generated and titled by a recurrent neural network, trained on over 23,000 tunes from ABC code posted on The Session: http://www.eecs.qmul.ac.uk/~sturm/research/RNNIrishTrad/index.html
Deep learning for assisting the process of music composition: https://highnoongmt.wordpress.com/2015/08/15/deep-learning-for-assisting-the-process-of-music-composition-part-4/