How separate L and R channel to out different audio sources at same time?

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Is it possible to separate sound output from different programs works at same time throught L and R audio channels respectively with one sound card on the linux (armbian ubuntu) device like Nano pi, orange pi, raspberry pi due to alsa asound.config?
Program A works in mono with ch R, program B works in mono with ch L.

Можно ли разделить вывод звука от разных программ (А и Б), работающих одновременно по аудиоканалам L и R, соответственно, с одной звуковой картой на устройстве Linux (armbian ubuntu), например (Nano pi, orange pi, raspberry pi) через конфиг файл asound.config?

What I have tried:

I could do only when program A or program B works.

Posted 7-Dec-20 4:58am

Roman Gaisin

Updated 7-Dec-20 5:37am

v4

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Peter_in_2780 7-Dec-20 21:12pm

Have you investigated ALSA? I think it can do what you want, but I haven't tried it myself.

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Roman Gaisin · Accepted Answer · 2020-12-07T18:48:00

i configure asound.conf

pcm.dmix_stream
{
	type dmix
	ipc_key 321456 
	ipc_key_add_uid true
	slave.pcm "hw:2,0"
}

pcm.ch1 {
	type plug
    slave {
        pcm dmix_stream 
        channels 2
    }
    ttable.0.0 1	
}

pcm.ch2 {
	type plug
    slave {
        pcm dmix_stream 
        channels 2
    }
    ttable.0.1 1	
}

pcm.!default
{
	type asym
	playback.pcm
	{
		type plug
		slave.pcm "ch1"
	}
	capture.pcm 
	{
		type plug
		slave.pcm "hw:2,0"
	}
}

it works