The most likely reason that the surround processor or receiver is displaying Pro Logic II instead of Dolby Digital or dts is that the signal it is receiving is a stereo (2 channel) signal instead of the 5.1/7.1 Dolby or dts bitstream audio.

This can often be caused by one of two things – either the source device (i.e. the Blu-Ray or Cable box for example) is connected to the processor via only analog connections, or the source’s digital output has not been configured properly. If there is only analog connections to the processor, an digital optical, coaxial or HDMI connection must be added and assigned in order to decode Dolby Digital and dts soundtracks. If there is already a digital connection set up but the unit will not decode Dolby Digital or dts, most likely the digital output of the source player has not been set up to output these formats, or the source material is not encoded in Dolby Digital or dts 5.1.  Please refer to your source’s owner’s manual to determine how to configure the digital output to stream Dolby Digital and dts.