Yes you are correct straight disengages all the processing , my receiver also has a surround standard and a surround enhanced ... I don't care about the enhanced I was just curious what the differences were between straight and the surround standard mode ? I just read in the manual That surround standard DTS will output 96/24 , straight does not mention anything. I'm pretty sure, correct me if I'm wrong , the cinema DSP modes do not even do 96/24 ? It seems to me though from listening back-and-forth, surround standard adds a little bit more of an effect than straight does