Originally Posted by Balboa
salrmrcrey, check your audio settings in the s550. Make sure you have DTS set to output DTS and Dolby set to output Dolby and not PCM 2ch.
The optical and coax output will run up as far as discrete 5.1 but not 7.1
I was partially true (but that would mean all false logically, I guess). After looking at the manual, it will not send uncompressed audio over Coax/Optical. It will send the DD/DTS core (compressed audio) over the Coax/Optical cables. It needs to be set as bitstream and not PCM, PCM gives 2.0 output for thee Coax/Optical outputs. I think that is where I was confused with the 2.0 output.
To receive the DD/DTS output the manual note on the chart listed on Page 66 lists:
*4 Bitstream: when "Dolby Digital" is set to "Dolby Digital" or "DTS" is set to "DTS" in the "Audio Settings" setup (page 46)
Based on the chart, it lists Dolby Digital/LPCM 2ch for everything (or DTS/LPCM 2ch), I thought that meant optical was always 2 ch. However, I now see that it is either
Dolby Digital OR
LPCM 2 ch.
salrmrcrey, if you ever change out to a receiver that has anaolg 7.1 or hdmi audio, make sure you make the appropriate changes to the 550 or you will only get compressed audio. The uncompressed audio is quite a bit better to listen to compared to plain DD or DTS.