[vdr] Re: Howto route audio through soundcard

["Dr. Werner Fink" <werner@suse.de>]

On Thu, Feb 12, 2004 at 12:42:19PM +0100, Andreas Breitenbach wrote:
> Dr. Werner Fink wrote:
> .
> >>
> >> Is it possible to use the SPDIF output of the DVB card and route the
> >> signal to the SPDIF input of the soundcard, then over the normal
> >> output to the stereo amplifier?
> >>
> >> If yes, which plugins do I need?
> >
> > bitstreamout 0.50a should do the job for both MP2 and AC3 audio.
> >
> >
> Thanks for the hint. I looked into the README of bitstreamout but I think
> this supports only the output of the raw stream over a S/PDIF output to
> a digital input of a digital amplifier.
> 
> What I actually need is a way out of the analog output of my onboard sound
> (can output analog 5.1) of my board with SIS651 chipset.

I can not add a decoder even if a52dec lib is GPL ... the Dolby Labs Inc.
do have patents and rights on that stuff.  This would be a big problem
for SuSE and now also for Novell.  Beside this I've payed personally
my license fee by buying a A/V amplifier.  Therefore, why not using it
and the much better audio components of the Pioneer amplifier.

> There is a tool called dtsdec to decode the DTS signal and put it to the normal
> soundcard output. Is it possible to pipe the stream into that tool or is there
> another solution?

A DTS decoder software is new for me.  And AFAIK the DTS Inc. had
never opened their standards to ATCS nor to us, the OpenSource community.
If there is a DTS decoder software then this have changed :^)

AFAIK the current a52dec lib should be able to use ALSA and if your
sound card is supported with multi channel output  it should works
simply with `-a' option.   AFAIK there is also a plugin around doing
the same stuff from Marcel Wiesweg.

IMHO the DTS thing could be currently illegal whereas the second part
may provide some problems for any kind of (re)distribution even if
non-commercial and only by an URL linke as the OpenBSD people had be
told by the Dolby Labs Inc.


      Werner


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