Mmmm, after reading this thread http://forums.steampowered.com/forums/archive/index.php/t-2717189.html, I wonder, could it be a mouse issue?
Does the music continue to play after the game freezes? If yes then it could be something with the mouse.
Like the options 'enhance pointer precision' or 'display pointer trails'.
Also someone says 'I was able to fix this issue by checking Disable display scaling on high DPI settings on the compatibility settings for the executable of the game.'
Worth a try if you have this option somewhere.