Is anyone getting 5.1 sound from their Macs in Windows 7 while gaming? How? I have the latest 27" i7 iMac connected to Logitech Z-5500 speakers via TOSLINK. I get 5.1 on the OS X side. In Windows 7, I get 5.1 when playing DVDs, but not from any games. If I select 5.1 or Dolby surround from the "sound options" within each game, it still comes out stereo. Any thoughts?