[mythtv-users] Not getting Dolby Prologic out of s/pdif

[Warren]

Dolby Pro Logic is encoded right into the stereo sound.  All the WinPVR
cards do is grab the sound and digitize it.  There should be no change
in the slight variation if the modulations of the sound that give the
pro-logic encoding.

The pro-logic would be decoded and split to the various channels by your
sound system from the stereo wave form.

Also note the AC3 (Dolby Digital) and Pro-Logic are 2 totally different
things.  AC3 comes in digitally and is passed to the hard drive by a
digital encoder card (ie a pcHDTV 3000).  You cannot get AC3 from an
analog signal, which is what your WinPVR card is encoding.

Regards,
Warren

James Oltman wrote:
>
>
>     However, when watching live tv I'm only getting the front L & R
>     speaker
>     producing (not very good) sound.  I was expecting all the speakers
>     to emit
>     sound in a dolby prologic stylee, or am I mad?
>
>     I have AC3 pass through set in both my Xine config and mythtv
>     settings.
>
>
>
> As I remember it, the encoder cards (PVR-x50 and PVR-500) do not
> encode prologic.  They only encode stereo sound.  You would have to
> use your ALSA config to get replicated sound out of your back
> speakers.  I don't do the replicated sound out of the rears otherwise
> I would help you further.
>
> Jim
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