OK I finally got it working. The problem was that I mixed the dsnoop
for mulitiple access and the plug for channel assignment.
So here is my working setup to recort 8 channels in parallel:
hw:0,0 ---> capt ---> c1
---> c2
....
and here is my .asoundrc
pcm.capt {
type dsnoop
ipc_key 223456
slave {
pcm "hw:0,0"
rate 8000
period_time 0
period_size 320
channels 12
format S32_LE
}
}
pcm.c1 {
type plug
ttable.0.0 1
slave.pcm capt
}
pcm.c2 {
type plug
ttable.0.1 1
slave.pcm capt
}
pcm.c3 {
type plug
ttable.0.2 1
slave.pcm capt
}
pcm.c4 {
type plug
ttable.0.3 1
slave.pcm capt
}
pcm.c5 {
type plug
ttable.0.4 1
slave.pcm capt
}
pcm.c6 {
type plug
ttable.0.5 1
slave.pcm capt
}
pcm.c7 {
type plug
ttable.0.6 1
slave.pcm capt
}
pcm.c8 {
type plug
ttable.0.7 1
slave.pcm capt
}
Hope it helps someone in the future,
Peter
On Tue, Feb 22, 2011 at 12:08 PM, Peter Hoffmann <ph@xxxxxxxxxxxxxxxxxx> wrote:
> I'm one step further. I got the "Device or resource busy" error
> because I use the wrong slave.pcm in my .asoundrc:
>
> pcm.ice1712 {
> type hw
> card 0
> device 0
> }
>
> # envy24 channel 1 only
> pcm.channel1 {
> type plug
> ttable.0.0 1
> slave.pcm ice1712
> }
>
> The first definition is not necessary because there is already a
> default configuration in /usr/share/alsa/cards/ICE1724.conf with
> dsnoop
>
> # default with dmix & dsnoop
> ICE1724.pcm.default {
> @args [ CARD ]
> @args.CARD {
> type string
> }
> type asym
> playback.pcm {
> type plug
> slave.pcm {
> @func concat
> strings [ "dmix:" $CARD ",FORMAT=S32_LE" ]
> }
> }
> capture.pcm {
> type plug
> slave.pcm {
> @func concat
> strings [ "dsnoop:" $CARD ",FORMAT=S32_LE" ]
> }
> }
> }
>
> Now I changed my .asoundrc to
>
>
> # envy24 channel 1 only
> pcm.mono_channel1 {
> type plug
> ttable.0.0 1
> slave.pcm "default:0"
> }
>
> # envy24 channel 2 only
> pcm.mono_channel2 {
> type plug
> ttable.0.1 1
> slave.pcm "default:0"
> }
>
> and so on.
>
> But I still cannot record channels beside the first one. On the rest I
> a recording with no sound.
>
> Am I using the right ttable definitions?
>
> Thanks,
> Peter
>
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