I bought 5.1 sound system and JVC receiver, connected to PC via S/PDIF... All components work(play sound) but the problem is that for example in game when i must hear something behind me, i hear it from the front speakers... left/cntr/right balance works fine but rear/front.... the receiver adjusts the mode to 'LINEAR PCM' automatic and the mode goes to 'DOLBY DIGITAL' only in sound options, where i can test the DD... when i test it everything`s great... i can hear every single speaker playing alone for itself but thats only from the test ... in the applications i hear the sound not 5.1 but 3.1 ... the rear speaker work but they work at the same time with the front... And so... any ideas how to adjust the thing correctly to have a nice surround sound ... is it from soundcard or maybe some codecs(driver`s are the latest btw) or maybe some options on the receiver i dont know ...can i make somehow the receiver to work in DD mode all the time or it make`s it only automatic... i don`t know I just want to hear sound from behind when someone talks behind me sound Realtek HD audio ... pls help