Oppo as pre-pro - 5.1 Set-up Tips and Details
A few posts back, I asked some questions re; Oppo set-up as a pre-pro with multiple speakers. Received some good advice, especially from Bob Pariseau.
Below is a quick summary of what I worked out with help from the forum and Oppo tech support. Overall, this is working very well. I wanted to preserve very high quality audio, a minimalist box count and was willing to forego (for now at least) active room corrections.
So here is the set-up:
Oppo ->Amplifier(s) -> Speakers (5.1, no AV processor).
Roku Streaming Stick+
Wired ethernet with Synology NAS
Kinovo HDMI Switch
The xfinity HDMI was plugged into HDMI IN on the OPPO, HDMI OUT went to the HDMI/ARC port on the Samsung and the Roku was plugged into another HDMI port on the Samsung. After much fiddling with ARC (with some suggestions from Oppo tech support) but always getting 2-channel sound only, I discovered on a Samsung forum that this is limit of Samsung, not Oppo. Samsung can create a DTS Neo 2:5 multichannel signal from the Roku, but this was to much post processing for me.
--> Tip from Oppo: If you want to see the audio format being delivered via ARC, use the page-up/page-down buttons on the Oppo remote. Nifty.
I used a Kinovo HDMI switch and have both the Roku and xfinity into the HDMI IN port of the Oppo. This had immediate benefits:
a) everything goes thru Oppo video processing - so all info, zoom, etc. functions are always available.
b) one-time audio synch set-up (in our case 80 ms).
c) everything goes thru Oppo audio processing, taking 'native' formats from xfinity and Roku.
I trimmed the various speakers following advice from Mr. Pariseau - Check the forum for details. For music, I run the fronts as LT/RT to get the cross-over processing, and ended up with the crossover setting at 70 Hz. I use the balanced outs to the front speakers, and the unbalanced outs for the center and rear surrounds.
Issue: For some reason, the Sonos Connect, running at fixed output (for 'bit-perfect' output via coax), is substantially louder than the HDMI inputs, by nearly 10 dB. This tends to set the typical Oppo volume below that to achieve the optimum SNR (see early Pariseau pos for details on this).
Bottom Line: consider an HDMI switch if running several HDMI sources and using the Oppo 205 as a pre-pro. Too bad Oppo, on the 205, chose not to offer multiple HDMI inputs. The incremental cost is quite low.
Last edited by clpetersen; 12-27-2017 at 04:50 AM.
Reason: too long