Hi, I have both my PS3 and Sky going to my amp and then going to the Screen. Everyting supports HDMI 1.3 (except the Sky obviously). Audio is therefore being output through HDMI not via coaxial/optical. My previous Yamaha amp recognised whether the disc was DTS or Dolby as the light came on. I'm not sure this is the case here. I have Empire Strikes back on and selected Dolby Digital 1.5. The amp displays PCM, HDMI and DD PLXii. Am I getting the best sound here? Thanks.