I'm currently a Dish customer with a DD sat receiver. I'm thinking about changing to DirecTV (long story). The question is this: is the RCA DRD435RH Dolby Digital capable? RCA's website states only that this unit has a optical output and that it has digital sound but does does not mention that it is a Dolby Digital reciever as it does in its description of their other units. So, as long as their is digital output (optical in this case) will it transmit DD to my DD audio receiver (like PPV DD movies)as my current Dish receiver does?