I have a Panasonic Blu-ray DMP-BD79 player connected via HDMI to my Samsung HD Tv, and an optical audio out from the tv to my old Yamaha Rx-795 surround sound amp. I wasn't getting Dolby Digital on the amp and after a little research found the Samsung TV doesn't pass through Dolby Digital. So after more research bought a Prozor HDMI audio extractor (3 HDMI in / 1 HDMI out and 1 spdif toslink audio out). After reconnecting everything, optical out from extractor to amp, amp still not getting 5.1 Dolby Digital - set extractor to 5.1 Ch audio out. Using Cloud Atlas Blu-ray to tedt. By default Blu-ray player outputting DTS-HD Master Audio, so switched to Eng2 Dolby Digital however this contains commentary and still not showing as 5.1 Dolby Digital on amp. Help! What am I doing wrong? I guess Blu-ray has a better than 5.1 Dolby Digital audio, but for all the extractors I've seen to have HDMI in and 5.1 Ch audio out, surely Blu-ray source must either also have regular Dolby Digital, or audio is 5.1 compatible? note: I also tried regular dvd with Dolby Digital soundtrack and amp still shows Dolby Pro logic.