[vdr] Re: 5.1 Sound with analog soundcard?

[Guido Fiala <gfiala@s.netic.de>]

On Tuesday, 1. July 2003 17:19, anaxares@gmx.de wrote:
> Hello,
>
> as nobody seems to be able to help me, I assume everyone has either
> - a digital amplifier that can handle the spdif-out from the soundcard
> or
> - is satisfied with the stereo-sound from the DVB-S card.
>
> I however have a "cheap" dolby 5.1 box set with analog 6-channel input
> and an onboard 6ch-out soundcard.
> Isnīt there any possibility to convert the AC3-sound to analog-6ch by
> software? And no, I donīt want to connect together X soundcards to convert.

I'am stuck with the same setup - did'nt want to buy a set of 
plastic-boxes+5.1amplifier if i already have nice amplifiers and boxes.
thought one should be able to feed them nicely with the soundcard.

There are 2 separate special problems:
1.Only Pro7 send 5.1 streams, so you can beside that only play dvd's with ac3

2.theoretically "dolby-digital" or call it simply "dolby" has encoded the 
rear-channels (and even the lfe+center) into the 2 stereo-signals. Most 
tv-stations transmit that sound all the time and "good" tv-sets can make 
"virtual-surround" out of it, meaning that all 5+1 speakers can be feed with 
2 stereo-channels, it's not perfect, but quite nice to have.

Why should'nt a sound-card not be capable of the same?
Is there none that can do this for patent-reasons or what?
I asked that question more than 3 years ago in the alsa-ml and there seems 
still to be no solution...

In case i do the step and buy a AC3-decoder+amplifier - does someone know it 
it can do the above? With digital-in-signals and/or with analog signals?
Some recommendations/prices?


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