Can anyone help with getting 5.1 sound on freeview hd with mediaportal 1.3. I have followed all the instructions for setting up mpar, lav codecs etc etc but it does not work when using toslink connection to the amp. I only get stereo. I have tried also using ffdshow and ac3 and setting up tv post processing. This works of sorts but ffdshow causes massive av sync problems and ac3 filter works only intermittently. MP looks like a great program but this is a real showstopper. Any help to get this working would be much appreciated. I know there are other similar threads but they are not quite appropriate to this issue.