I own a BDP-103 with the latest firmware (great player and great forum !). It is connected to a pre-HDMI Rotel RSX-1056 receiver via both Coaxial Digital and Analog outputs. My front speakers are set to large on both devices. I was playing a stereo redbook CD to compare the sound quality between those two connections (comparing the DACs, I suppose), when I noticed something I can't explain...
According to the Oppo's user manual : "Speaker Configuration mainly applies to the multi-channel analog audio outputs. However, when Coaxial/Optical Output is set to LPCM in the Setup Menu, its signal becomes a down-mixed stereo version of the multi-channel signal that is sent to the multi-channel analog audio outputs. As a result, the LPCM signal from the coaxial and optical output is affected by the settings in Speaker Configuration."
However, based on what I'm hearing (and measuring with an SPL meter), it seems the speaker trims on the Oppo's Speaker Configuration screen DO affect the volume level via the Coaxial Digital connection even if Coaxial/Optical Output is set to Bitstream in the Oppo's Setup Menu. I can clearly demonstrate that with reedbook CDs, although DD/DTS movie soundtracks don't seem to be affected (as expected).
I'm a bit puzzled with the above behavior... Any thoughts ?
Thanks in advance for any feedback.
Last edited by FernandoF; 09-05-2014 at 09:24 PM.