Funny thing, I had all the analog cables disconnected and listened to SRV using coax connection. When I switched SRV for Carmina Burana, I got no sound. Popped SRV back in and all was well. Back to Carmina Burana, no joy. I don't think the player will output SACD over digital. As you know, this is all new to me but I'm trying to learn.
The only possible
digital output for SACD on the Oppo is HDMI (it will actually convert SACD to PCM first). You definitely cannot pass SACD via digital coax or toslink. If you're usign HDMI for SACD (which will require that your AVR be HDMI 1.1-compliant), make sure to set HDMI to 'Auto' in the user menu, and also change the HDMI resolution (using the remote's 'HDMI' button) to 720 or 1080. Also set digital output to 5.1 channel, not 2-channel. ALso set S/PDIF output to Raw just to be safe.
On a side note, this player just seems screwy. When I use HDMI, I only get 2ch for DVD movies and music.
Make sure you haven't set the oppo to downmix to 2-channel. Set it to 5.1
It's one of the items in the user menu.
The strangest thing was when I tried to level adjust using the Avia disc, the test tone for left surround came out the left front speaker and right surround from right front, but when the phase test came on, the fronts played during front in-phase, but the rears played during front out-of-phase. Otherwise the rears won't play using HDMI output. That's why I'm using coax. I don't know if the wiring in the HDMI connection is messed up or what.
Set HDMI output to Auto as above. Also check your speaker connections to the AVR, make sure the channel assignments are right. Make sure Dolby Pro Logic is OFF when you do the Avia tests.
Have you carefully read the TWO user manuals that come with the Oppo? It reads like most/all of your issues come from improper setup of the Oppo. The only thing to note is that some of the names of setting options have changed since the manuals were first printed; I'm not sure the recent manuals have been updated.