The new song, 'Joyful Time in The City', was created in two short weeks by Microsoft's Artificial Intelligence technology. The melody and lyrics were formed through detailed analysis of over 50 classic Christmas carols, which the computer used to construct its interpretation of what makes a great carol. Machine Learning tools identified patterns in the tunes and used those to predict what should come next. The final result is a heart-warming mix of Christmas carols from decades past and popular songs from the present day. The capacity of machines to process large quantities of data and recognize patterns far surpasses that of humans.