On Thu, 29 Jan 2004 08:37:49 +0200
"Jonathan Lee Mahon [VDB Mechancial Maintenance]"
<[EMAIL PROTECTED]> wrote:
> >> On Saturday 17 of January 2004 4:23 pm, raptor wrote:
> >> > how can i make 2 or 4 channels sound be expanded to 5+1...
> >> > I'm doing some tricks with mplayer, but I need more general
> >solution> > which will work also fro xmms,mpg123,tvtime,zapping
> >etc...>
> >> yeah, I'm curiuos about it too. Does anybody know, how to configure
> >> .asoundrc or what is needed ?
>
> >just to clarify (i don't have a solution): You want the 2 (4) output
> >channels to be somehow distributed among 6 speakers? I don't know, if
> >there's a plugin that does that.
>
>
> >--
> >signature :)
>
>
> Some sound cards use a proprietary algorithm in their (wondow$) driver
> to do this. One of which is by QSound called QXpander(tm). I don't
> think there would be something equivalent in the Alsa driver.
Hi, look at the thread "pcm copy plugin". I quote takashi here:
---quote start
"route (and plug) plugin already can do that.
for example,
pcm.ch40dup {
type route
slave.pcm surround40
slave.channels 4
ttable.0.0 1
ttable.1.1 1
ttable.0.2 1
ttable.1.3 1
}
pcm.ch51dup {
type route
slave.pcm surround51
slave.channels 6
ttable.0.0 1
ttable.1.1 1
ttable.0.2 1
ttable.1.3 1
ttable.0.4 0.5
ttable.1.4 0.5
ttable.0.5 0.5
ttable.1.5 0.5
}
and you can play two channel WAV like
% aplay -Dch40dup 2ch-stereo.wav
% aplay -Dch51dup 2ch-stereo.wav
for 4.0 and 5.1 surrounds, respectively.
of course, this is just copy of left/right samples, no dolby prologic
effect is included ;)"
---quote end
Flo
--
signature :)
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