[vdr] Re: 5.1 Sound with analog soundcard?

[Matthias Ehmann <Matthias.Ehmann@uni-bayreuth.de>]

Hello Marcus,

have you tested a52dec with DVD-plugin?

I receive audio glitches/interruptions once or twice a second when 
replaying DVDs.
I use the following option:
... -a 'a52dec -oss6 -g+35' ...
Trying ac3dec produces the same problems.


regards,

Matthias


Markus Schorer wrote:

> hi,
>
> sure it's possible.
> use a52dec and let it decode to 5.1 (or some other fixed setups).
> i'm doing the same. it works really good.
>
> small problems remain:
> - there is no way to switch between stereo and 5.1 like switching
>  languages (this is how i think it should be done).
> - there is no (at least built-in) method of adding a delay to the
>  sound, 5.1 + stereo gives a "echo" (5.1 is early).
>
> regards,
>
> Guido Fiala wrote:
>  
> > 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.
> > > Isn´t there any possibility to convert the AC3-sound to analog-6ch by
> > > software? And no, I don´t 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?
> >
> > --
> > Info:
> > To unsubscribe send a mail to ecartis@linuxtv.org with "unsubscribe vdr" as subject.
> >    
>  
--
Matthias Ehmann
GEONExT-Group
Lehrstuhl für Mathematik und ihre Didaktik
Universität Bayreuth
95440 Bayreuth

Tel 0921 - 55 3268
Fax 0921 - 55 2161

http://geonext.de
http://did.mat.uni-bayreuth.de




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