It depends on which model it is and the audio format used by the TV channel.
The newer line allows you to set defaults for different audio formats (they are pre-assigned as a default, but you can change them) so if eg. you have 2 channel PCM set to default to PLII Music but DD 2.0 set to default to PLII Movie, it will change automatically when the TV channel audio format changes from PCM to DD 2.0.