I've been googling a bit for how to output the same sound on two sound
cards, and have found some bits, but I just can't get it to work with my
setup.
I have two sound cards; one RME9652, and one built-in VIA thing. The
RME is connected to the stereo via S/PDIF, and the VIA thing is
connected to a wireless transmitter.
This is the RME setup from .asoundrc:
pcm.rme9652 {
type plug
slave {
pcm hw:0;
}
route_policy copy
ttable.0.16 1
ttable.1.17 1
}
16/17 are the S/PDIF outputs.
The VIA setup is much simpler:
pcm.via {
type hw;
card 1;
}
Both work perfectly when using mpg123 with -a rme9652 or via.
So I tried with this multi setup:
pcm.multi {
type multi;
slaves.a.pcm rme9652;
slaves.a.channels 26;
slaves.b.pcm via;
slaves.b.channels 2;
bindings.0.slave a;
bindings.0.channel 0;
bindings.1.slave a;
bindings.1.channel 1;
bindings.2.slave b;
bindings.2.channel 0;
bindings.3.slave b;
bindings.3.channel 1;
}
pcm.ttable {
type route;
slave.pcm "multi";
ttable.0.0 1;
ttable.1.1 1;
ttable.0.2 1;
ttable.1.3 1;
}
That is, I create a multi device with four channels, and then I create a
routing device that has two inputs that outputs to the four inputs from
the multi device.
When trying to play anything, I get this:
----------------
[larsi@rocket-sam ~]$ /usr/local/src/mpg123-0.61/src/mpg123 -a ttable /music/repository/Arto\ Lindsay/Prize/01-Ondina.mp3
High Performance MPEG 1.0/2.0/2.5 Audio Player for Layers 1, 2 and 3
version 0.61; written and copyright by Michael Hipp and others
free software (LGPL/GPL) without any warranty but with best wishes
Directory: /music/repository/Arto Lindsay/Prize/
Playing MPEG stream 1 of 1: 01-Ondina.mp3 ...
MPEG 1.0 layer III, 256 kbits/s, 44100 Hz joint-stereo
[audio.c:264] error: No supported rate found!
----------------
I've tried other combinations of setups, and I'm able to create a multi
device over the VIA device, and I'm able to create a multi device over
the RME device, but then I don't get any sound output whatsoever.
Am I misunderstanding how this is supposed to work?
--
(domestic pets only, the antidote for overdose, milk.)
larsi@xxxxxxxx * Lars Magne Ingebrigtsen
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