I've never heard of an aspect ratio of 64:27 ....... However, I can't understand why 21:9 films don't play perfectly on your 21:9 monitor. Unless of course, that subtitles are displayed beneath the bottom of the actual picture, in an area that would be seen on a more normal 16:9 monitor. In which case I think that the only solution is to buy a 16:9 monitor, which is a shame for you. The problem is not with the disc player, so changing that would not help. How long have you had your LG monitor?