Thank you for contacting us again at 2K Support and for your update!
I have come across your message and reviewed the messages you submitted and received. I understand that Bioshock 1 you do not have 5.1 Surround Sound. I know how discouraging this must be. As a fellow gamer, I truly understand that we players, in order to fully enjoy the game need to get the real experience provided by the next gen and TV's we have. Unfortunately, after further investigation, Bioshock 1 doesn't support 5.1 Surround Sound.
I apologize for the inconvenience. If you ever have any another questions or concerns, please don't hesitate to open a new ticket, as it would be our pleasure to assist you further!