Hello,
I would like to split my stereo codec into two mono channels (input/output)
(hardware restriction, I would like to use this configuration into a
embedded system) but using pulse audio.
I could have separated using Alsa , but I will need apply echo-cancelling
in each channel.
I'm trying to connect the alsa output to pulseaudio but I didn't have
success.
Someone has some better idea to split this channels using pulseaudio? My
configuration using alsa is above.
The basic configuration in my .asounrd is:
cat ~/.asoundrc
pcm.input_left {
type dsnoop
ipc_key 234884
slave {
pcm "hw:0,0"
channels 2
}
bindings.0 0
}
pcm.input_right {
type dsnoop
ipc_key 2241234
slave {
pcm "hw:0,0"
channels 2
}
bindings.0 1
}
pcm.device-separation {
type dmix
ipc_key 1234
slave {
pcm "hw:0,0"
period_time 0
period_size 4096
buffer_size 8192
rate 44100
}
}
pcm.output_left {
type route
slave.pcm device-separation
slave.channels 2
ttable.0.0 0.5
ttable.1.0 0.5
hint.description "Left channel"
}
pcm.output_right {
type route
slave.pcm device-separation
slave.channels 2
ttable.0.1 0.5
ttable.1.1 0.5
hint.description "Right channel"
}
After I modify the file to try connect the alsa to pulseaudio
pcm.input_left {
type dsnoop
ipc_key 234884
slave {
pcm "hw:0,0"
channels 2
}
bindings.0 0
}
pcm.input_right {
type dsnoop
ipc_key 2241234
slave {
pcm "hw:0,0"
channels 2
}
bindings.0 1
}
pcm.input_left_pulse {
type pulse
slave.pcm input_left
}
ctl.input_left_pulse {
type pulse
}
pcm.intput_right_pulse {
type pulse
slave.pcm input_right
}
ctl.intput_right_pulse {
type pulse
}
pcm.device-separation {
type dmix
ipc_key 1234
slave {
pcm "hw:0,0"
period_time 0
period_size 4096
buffer_size 8192
rate 44100
}
}
pcm.output_left {
type pulse
slave.pcm device-separation
slave.channels 2
ttable.0.0 0.5
ttable.1.0 0.5
hint.description "Left channel"
}
clt.output_left {
type pulse
}
pcm.output_right {
type pulse
slave.pcm device-separation
slave.channels 2
ttable.0.1 0.5
ttable.1.1 0.5
hint.description "Right channel"
}
ctl.output_right {
type pulse
}
In the /etc/pulse/default.pa I added these lines
load-module module-alsa-sink device=output_right
load-module module-alsa-source device=input_right_plug
load-module module-alsa-sink device=output_left
load-module module-alsa-source device=input_left_plug
But these configuration it's wrong and doesn't work .
Someone have a better idea?
Thank you very much!
Regards,
--
----------------------------------------------
Caio Pereira
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