Hello I own a Yamaha RX465 receiver which is connected to my PS4 via HDMI for audio\video but I can and have also connected via Optical for audio only. With my PS3 when I selected DD/DTS output, the receiver correctly received and displayed the signal as DD/DTS, however with the PS4 on Linear PCM, Bitstream etc it outputs sound fine but displays as PCM. This then let's me adjust the pro logic audio settings but that seems more like a virtualisation of a stereo signal to me? It does output to all 5.1 speakers and changing to Optical doesn't change the signal 'name'. However, should it not switch to a digital signal like the PS3 and Xbox One do?