Reposted, in attempt to get Sourceforge to format it correctly:
Hi,
I
have a Xonar D1 PCI sound card, and am trying to play a 5.1 audio
stream through my 2.1 speakers using xine. (Xine is actually playing the
DVB stream from a HD TV channel, and this TV channel switches between
2.1 and 5.1 audio, depending on the programme). The default ALSA
surround51 device only plays a few of the 5.1 audio channels through my
speakers, so I have added the following new "downmixing" device to my
.asoundrc instead:
pcm.51to21 {
type route
slave {
pcm "plughw:0"
channels 3
}
# Front and rear, at 33% of original signal strength
ttable.0.0 0.58
ttable.1.1 0.58
ttable.2.0 0.58
ttable.3.1 0.58
# Centre channel routing (routed to front-left and front-right),
# 6dB gaindrop (gain half of main channels) per channel
ttable.4.0 0.57
ttable.4.1 0.57
ttable.5.2 1
}
This
seems to do a reasonable job, but has a fatal flaw - it cannot share
the hardware with the "default" 2.1 PCM device! In fact, it takes at
least 5 seconds for the "default" device to surrender the hardware so
that xine can open my "51to21" device instead.
Is there a way of using the dmix plugin so that these two distinct PCM devices
can share the hardware, please?
Thanks for any assistance,
Cheers,
Chris
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