[Dirk Bruere at NeoPax]

Something I have not been able to check for various reasons.
If I am playing a surround sound movie via a soundcard that decodes
the output to (say) 7.1 can I still get SPDIF PCM (unencoded) for the
front 2 channels?

[Arny Krueger]

"Dirk Bruere at NeoPax" wrote in
message

Something I have not been able to check for various
reasons.
If I am playing a surround sound movie via a soundcard
that decodes the output to (say) 7.1 can I still get
SPDIF PCM (unencoded) for the front 2 channels?

Probably not.

I'm under the impression that while we have media with several different
digital tracks on it (e.g. stereo, 5.1), the player selects and processes
just one of them. By the time the audio gets to the audio decoder, the
choice of channel format has already been made.

There may be a decoder someplace that downmixes multichannel to stereo, but
I know of none that concurrently decodes the multichannel track as
multichannel. Not that it couldn't exist...

[Dirk Bruere at NeoPax]

On 16/09/2010 17:45, Soundhaspriority wrote:
"Dirk Bruere at wrote in message
...
Something I have not been able to check for various reasons.
If I am playing a surround sound movie via a soundcard that decodes
the output to (say) 7.1 can I still get SPDIF PCM (unencoded) for the
front 2 channels?

Yes. Have a look at http://ac3filter.net/.

I use this in my HT PC.

Bob Morein
(310) 237-6511



Thanks - looks interesting.
Can you tell me if I can get (say) front left and right out of SPDIF PCM
while the rest comes out as analog?

I am really looking for a way to get front and rear speakers decoded to
2xSPDIF PCM simultaneously

--
Dirk

http://www.transcendence.me.uk/ - Transcendence UK
http://www.blogtalkradio.com/onetribe - Occult Talk Show

[Dirk Bruere at NeoPax]

On 16/09/2010 23:00, Soundhaspriority wrote:
"Dirk Bruere at wrote in message
...
On 16/09/2010 17:45, Soundhaspriority wrote:
"Dirk Bruere at wrote in message
...
Something I have not been able to check for various reasons.
If I am playing a surround sound movie via a soundcard that decodes
the output to (say) 7.1 can I still get SPDIF PCM (unencoded) for the
front 2 channels?

Yes. Have a look at http://ac3filter.net/.

I use this in my HT PC.

Bob Morein
(310) 237-6511



Thanks - looks interesting.
Can you tell me if I can get (say) front left and right out of SPDIF PCM
while the rest comes out as analog?

I am really looking for a way to get front and rear speakers decoded to
2xSPDIF PCM simultaneously

--
Dirk

http://www.transcendence.me.uk/ - Transcendence UK
http://www.blogtalkradio.com/onetribe - Occult Talk Show

Dirk,
I fiddled until it worked. My impression is there is a good chance you
can get it to do everything you want it to do. But this depends upon how
compliant the rest of your setup is with DirectShow, which is Microsoft's
framework for filters like AC3Filter. I recall that at one point, upgraded
the rest of the software I was using, (Google GBPVR), and I had to "shake
the box" to get the filters working again, by which I mean, the problem was
resolved without understanding.

Bob Morein
(310) 237-6511

The other problem I have is that I have no choice concerning the
playback s/w.
The good news is that it's ZoomPlayer.
I suppose I shall have to experiment, but other people must have tried
what I want to accomplish. I need to distribute digital audio to widely
spaced powered speakers (that can accept SPDIF PCM) and doing it analog
is just a total pain.


--
Dirk

http://www.transcendence.me.uk/ - Transcendence UK
http://www.blogtalkradio.com/onetribe - Occult Talk Show

[LAB]

If I am playing a surround sound movie via a soundcard that decodes
the output to (say) 7.1 can I still get SPDIF PCM (unencoded) for the front
2 channels?

It's not obvious. 7.1 is DTS encoded (compressed, similar to mp3), then
the sound card have to decode signal, then send 2ch PCM to the output. It
could be...

--
Gianluca