Split stereo channels over two simultaneous usb audio devices?

[micindev]

so i ended up with two amazon echo studios and i have no use for a wireless speakers - gift  both have a toslink input, but they are unable to play in stereo wired - channels have to splitted before.

is there a possibility to send left channel to one usb port, and right channel to second usb port?

thanks
-um

jackd might do it, but I'm not too sure if it can route mono signals to seperate audio cards.

Easier solution is to just get two ADCs (Analog to digital convertors), connect LCH to one, and RCH to another, and then optical cable to your echos. Although it's easy, quality may be a bit iffy as there could be phase differences (i.e. left and right channels may not be exactly in sync). However, because you are using echos, this difference is unlikely to be discernable.

thanks for reply

ah, ok... I thought it would be a simple line of code, somewhere someone said that alsa should be able to do it, but coding is beyond my abilities. I planned basic kitchen stereo synced with other rooms and I wanted to keep echo's dsp...

just found this article, not sure if it makes any sense... https://bootlin.com/blog/audio-multi-cha...g-alsalib/