I use a ps3 for my blu ray player and have a 7.1 channel onkyo TX-SR605 av receiver that supports all the high definiton surround sound modes. I recently bought pan's labrynith on blu ray and it has a 7.1dts hd master audio track. The problem is i cannot get the 7.1 track to play, my system always says it is in 5.1 and the back speakers dont do anything. I havent had a chance to try any other blu ray discs yet with a high definiton 7.1 sound track because there are not manhy yet. Has anyone else had this problem or do i just have something not set right any info would be greatly appreciated.