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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