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Oppo 970 and "raw RedBook signal" over HDMI

post #1 of 4
Thread Starter 
I recently bought the 970 and wrote to Oppo tech support about some questions I had after reading the manual and the "advanced" setup guide. Specifically, I was confused about when the speaker settings do and don't affect the output.

My first response from Oppo was that the "DownMix settings" effect all PCM audio. Fair enough.

Then I asked:
'If you have "Digital Output" set to RAW and "HDMI Audio" set to AUTO, what kind of signal is transmitted over the HDMI when you play a CD? It is PCM, correct? In this case, do the Speaker Settings affect the CD audio over HDMI?'

The response I got was this:

'If the receiving equipement will accept RAW bitstream then you will have
a raw RedBook signal to the receiving device through HDMI. Otherwise, it
will be PCM. If PCM, then the DownMix and Speaker settings will effect
the audio output.'


I have never heard of this "raw RedBook signal."

Are most receivers capable of decoding this?

I have never heard of anything other than PCM over SPDIF when playing CD audio (and the above setting supposedly duplicate over HDMI what you would get from the digital audio output.)

Just wanted to get any explanations you might have about the "raw RedBook" over HDMI....

P.S. Oppo tech support has been helpful and quick with replies.
post #2 of 4
I'm not sure what they are talking about either but...

Since you are in the dedicated audio player section I assume you bought the 970 because of it's great-for-the-money audio capabilities, if so, you need to use the analog outs, not the digital. If you use digital out, everything that is special about it's audio out is moot.
post #3 of 4
Thread Starter 
Quote:
Originally Posted by Harrypt View Post

I'm not sure what they are talking about either but...

Since you are in the dedicated audio player section I assume you bought the 970 because of it's great-for-the-money audio capabilities, if so, you need to use the analog outs, not the digital. If you use digital out, everything that is special about it's audio out is moot.

Nah, I posted in the audio section because it is a CD question, so I thought this might be a good place. (I also posted in the DVD section, btw.)

Actually, I bought the 970 because it can do 480i over hdmi.
post #4 of 4
I think they are confused. PCM is what you have on CD with 44.1/16 2 ch, so it won't be any down mixing at any stage on any outputs.
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