Originally Posted by
gyoung00 
help needed
brand new sonyS790
Yamaha aventage A2020 (almost new) - first use of blu ray player with it
Problem : cannot get DTS or DD (either standard or HD for EITHER) ouit the HDMI (into the 2020)
All output to AMP is PCM encoded (when using HDMI)
Note that if I use optical connection to AMP - it (correctly) decodes a DTS signal (when using the DTS-HD audio track on blu ray disk)
Settings
S790 and A2020 both with latest firmware from internet
have switched OFF all CEC and HDMI control in monitor, AMP and S790
using HDMI 1 output from S790 to AMP
audio hdmi is set to AUTO (note ive tried swityching between auto and PCM - no change in behaviour noted)
DSD output mode set ON (note i dont have any SACD to test with) and have also toggled this settingwith no change
dolby digital /DTS set to bitstream (note that toggled this and as expected when using optical input to amp it toggles between DTS and pcm as expected)
AV separation mode is set OFF (note ive tried using hdmi 2 output also - with no difference)
Trouble shooting
have tried different hdmi cables
have tried togglinga all relevant audio settings in s790
have tried toggling audio input settings on AMP (between auto - hdmi - optical)
tried toggling audi tracks on blu ray disc (discs previously worked with a different amp and blu ray player combination)tried different blu ray discs
using A2020 "information" to determine the AMP decoding settings for each different setting per above
(note the amp always shows "PCM" - but with some different parameters as expected betyween diff audio tracks ) when uing auto or hdmi input mode
amp decioder shows DTS or DD (not HD) as expected when using optical output from s790 and selecting optical input on amp (when toggling between DTS HD and DD auido tracks)
have tried different hdmi inputs on AMP
I (now) only have one AMP and Blu ray player to test with
bot amp and bluray were purchased overseas (i live in a country difficult to get high emnd audio) - so no option to swap
(but confident amp is ok as it decodes all expected formats when using network connected media server - albeit cant test DTS or DD HD audio
from network source
... e exhausted hours trying to trouble shoot this already
EDIT
problem SOLVED
turned OFF BD audi mix setting (perhaps it should have been obvious .)
the manual gives NO clues about the impact of this function! and its on by default