I was reading the full change log for 1.1 patch (in the journals section) and guess what! One of the changes is "+ New Music playing".
This is excellent because the old music caused me to have a headache after a few hours of playing and so I had to turn it off from the beginning, which was too bad! I just hope the new music is not as repetitive as the previous ones. (I realise that the old one will still be there).
Don't get me wrong, I love this game, I just don't like having headaches:)