Today I changed a setting on my Panasonic bluray player while listening to CD's and thought I would share after I recognized the instant change in sound.
My bluray player is connected by HDMI and has a built in option to select HDMI as the output for audio or to allow the player to decide (auto).
I changed it to auto and the moment I did the SQ improved.
My player is still connected by HDMI but my AVR display confirms an analog signal is playing.

It sounds more complete.