Does anyone know if you use the HDMI in on an OPPO for video processing does it feed sound out of its HDMI ports? I assume so. So this could be a solution for me as it has two HDMI outputs.
Input via HDMI1/2 on an Oppo is handled exactly the same way content coming from its own disc player is handled, namely being processed according to the same audio/video settings as well as being output via HDMI1/2 according to the "A/V split" settings and whether or not you have a "live" connection on HDMI2. Note that the 7.1 analog audio pre-outs are also always active on the Oppo, and are also configurable independently (as if they were going to an external amp/speakers) for analog mix-down (say to 2-channel stereo), even while digital audio output on HDMI1/2 is presented either as multi-channel decoded-LPCM or encoded-bitstream.
Interesting that there is a reported HDMI pass-through issue with the A16, which passes video but not audio. With the A8 the HDMI pass-through required that the unit be powered on, as opposed to the analog pass-through (i.e. "analog bypass") which required that the unit be powered off (resulting in physical relays closing, which you could hear) in order to truly pass-through 7.1 analog input to 7.1 analog output (as if via 8 straight wires). Back in 2013 I was going to place my A8 in between my Oppo 103 and my Yamaha RX-V867 AVR, with HDMI1 out of the oppo feeding HDMI-in on the A8, and HDMI-out on the A8 feeding HDMI1 into the AVR.
However there apparently was an HDMI handshake issue (involving either the above 3 devices, or also including a 4th device namely the 2-channel-only HDTV connected to the AVR if allowed to be visible via settings). I can't recall now if there was either only 2-channel stereo sound put out from the Oppo, or even worse no sound at all put out from the Oppo. It was as if the AVR when seen by the Oppo source device through the A8 was not deemed capable to receive multi-channel [LPCM] audio if there was 2-channel stereo emitted by the Oppo. And if it was the even worse symptom, with no audio at all, well that was completely inexplicable. Either result (and I apologize for not remembering which of the two it actually was) was completely unacceptable, since multi-channel LPCM out of the Oppo was required to feed mulit-channel LPCM into the A8.
Despite the fact that this HDMI pass-through failure (either one) was unexpected, especially with a common AVR like Yamaha, it was not possible to overcome. I ended up re-configuring things, running the Oppo in "A/V split" mode. HDMI1 video-only output went directly to the AVR. And HDMI2 audio-only output went directly to the A8 (and no further). The A8 was seen by the Oppo and HDMI handshake as "acceptable" to receive multi-channel LPCM as was required. With the A16 the additional Oppo audio processing option of "bitstream" is now also available, for multi-channel audio greater than 7.1 from the Oppo.
Note that with the Oppo, when operating in "A/V split" mode if HDMI2 is "powered off" then both audio and video are delivered out over HDMI1... which is going to the AVR, which controls its own connected speakers. So in this arrangement if you want to listen to TV via speakers rather than headphones, you simply power off the A8 (or A16) and use the AVR and its own normal speaker sound system as your non-headphone output.