Originally Posted by pvanosta
S let me see if I understand everything:
1. When only 1 HDMI output is 'live' (i.e. the device on the other end if the cable is ON), the OPPO will push both audio and video through to the device
2. In that case, the OPPO will TRY to send DSD to the TV in this case.
3. The TV can obviously not accept a DSD signal
What SHOULD happen then, is that the OPPO mutes the audio signal on the HDMI and, at the same time, it should still send the clean DSD signal through the OPPO DAC to the analog balanced output.
In other words: what I am asking it to do, it should do without any further intervention on my part.
And yet, unless I kill HDMI audio out in the Oppo menu, I cannot play back DSD through my analog outs. I get loud hiss unless I switch audio out to OFF on the HDMI in the menu., OR unless I switch SACD output to PCM
Would that constitute a possible / likely bug?
A couple clarifications. First, some HDMI devices keep their HDMI sockets "live" even when the device is OFF. If you have two devices cabled, it may not be sufficient to turn off the unused device -- or even change it to listen on another of its inputs -- to make that connection no longer "live". One of the more common reasons devices do this is so that they can implement HDMI CEC (remote control over the HDMI cable) -- another example of larding things onto the HDMI spec with unintended consequences.
But let's assume it really is the case that only the one cable is live. What happens when you play DSD content depends on your choice of SACD Output setting and what the device at the other end of the cable reports as to whether it can accept HDMI DSD input.
If that sole HDMI device reports it can *NOT* accept HDMI DSD, then:
1) With SACD Output PCM or SACD Output AUTO set, you will get HDMI LPCM, and PCM will also be sent to the DACs for Analog output. NOTE: You can set HDMI AUDIO OFF to get DSD sent to the DACs for Analog output.
2) With SACD Output DSD set, audio will be muted on that HDMI cable and DSD will be sent to the DACs for Analog output.
It is helpful to keep in mind that the player can not do DSD and PCM simultaneously. Thus if DSD is going to ANY output, then DSD must be going to ALL other outputs or those outputs must be muted.
The PCM choice does not try to use DSD.
The DSD choice prioritizes using DSD wherever possible and mutes the rest. I.e., only connections that can handle DSD will have audio,
The AUTO choice on the other hand prioritizes having audio on all the connections, so it uses PCM for all of them unless they can ALL handle DSD, in which case it uses DSD for all of them.
The Analog DACs are always capable of using DSD, so the only question is the capabilities of the "live" HDMI connections.
And in any event, the S/PDIF (Optical/Coax) will be muted regardless of what's going on with the other outputs, since that type of cabling is not licensed to cary SACD content.
You should never get the loud hiss you report when playing DSD content. So yes, that's a bug. The question is, a bug where? Is your TV misreporting its capabilities, or is the OPPO not handling that correctly?