A:Answer The optical out is geared for your TV. This unit runs primarily HDMI out, with some RCA out for 7.1 audio (if needed). Keep in mind, this unit runs a seperate HDMI out for audio, and one for video. They are not paird in the same cable. My reciever has Dolby Atmos in it. This unit will channel all the sound to your receiver and now it's up to your receiver to filter it properly. It is built in with 7.1, so it will do fine in most home theaters. It makes my Dolb Atmos really stand out, when compared to the lower qualtiy LG unit I replaced.
