Processing of analog 5.1 or PCM 5.1

[MouseRider]

Many systems are now typically 7.1 with stereo rears rather than a 6.1 mono rear arrangement.

For a low cost model, the Yamaha as listed earlier does it.

When you say "room-acoustically corrected", do you mean a system which will adjust the outputs so that the frequency response in your room is as accurate as possible or do you just mean that the processor will do something to steer sound to the rear speakers?