Guys, Before I am shot down in flames, I know there have been numerous previous threads about 5.1 surround sound which suffice to say I have read. But some of the content is confusing. Therefore can anyone answer a few questions. Firstly, is at all possible to receive 5.1 surround in PC games such as Far Cry & if so is this in digital or analogue. The reason I ask is that I have attached an optical out from the front of my Audigy 2 ZS Platinum soundcard panel to my Logitech 5.1 surround, but it is produced in Dolby Pro logic. If it was 5.1 the amp would recognise this & shows up in the display panel. Don't get me wrong the sound is superb from all 6 speakers, but am curious if I can further improve the sound in true 5.1. Secondly, I have also linked up the three leads for 6 channel sound. Again, is this actually 5.1?? Thirdly when I carry out the sound tests on the THX console using the digital output (i.e. The optical out to the logitech amp), sound is only prodcued from the two front speakers. The only way I can all six speakers to produce sound during this test is via the Six channel inputs.