Hallo,
Julien Claassen hat gesagt: // Julien Claassen wrote:
> I have a delta 1010 and want to define pairs of outputs. I wanna take two
> outputs and combine them into a stereo output. I already have a .asoundrc, but
> it doesn't work for that purpose. My definitions in there work for recording
> though. It looks something like that:
> pcm.io1 {
> type plug
> slave { card 1 }
> ttable.0.2 1
> ttable.1.3 1
> }
>
> I'm not sure about the ttable part. What I do is map channel 2 and 3 to 0 and
> 1. Do I really need to map them? Can't I simply tell alsa to combine them
> without ttable?
I *think* you need to use dshare for this. An untested asoundrc could
look like below. This only defines the first two stereo pairs, the
others should be obvious.
The important point to note here is the usage of the "bindings" fields
and the ipc_key, which must be unique, but the same for all pcm
definitions of one card. This does not use ttable at all, probably
because I don't understand how ttables work. ;)
# start asoundrc:
pcm.chan12 {
type dshare
ipc_key 3333
slave {
pcm "hw:0,0"
period_time 0
period_size 1024
buffer_size 4096
rate 44100
}
bindings {
0 0
1 1
}
}
ctl.chan12 {
type hw;
card 0;
}
pcm.chan34 {
type dshare
ipc_key 3333
slave {
pcm "hw:0,0"
period_time 0
period_size 1024
buffer_size 4096
rate 44100
}
bindings {
0 2
1 3
}
}
ctl.chan34 {
type hw;
card 0;
}
# End asoundrc
ciao
--
Frank Barknecht _ ______footils.org__
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