linux record audio (arecord or similair) and separate left/right channel

I want to record (line in) from an audio device and separate the left and right channel each to a different process, or record them separately of course. What I want is something like that (play command just as example): either:

arecord (left channel only) -q -D plughw:1,0 -f S16_LE -r 22050 | play -t raw -r 22050 -b 16 -e signed -q - 
arecord (right channel only) -q -D plughw:1,0 -f S16_LE -r 22050 | play -t raw -r 22050 -b 16 -e signed -q -

(may also result in device or resource busy?) or something like "arecord | splitchannels (leftchannel | process 1) (rightchannel | process 2)" or possibly more like that "arecord | tee >(getleftchannel | process1) >(getrightchannel | process2) > /dev/null" as intensive web searches didn't give any usable results. Any idea how I can accomplish that?