how to multiplex/demultiplex two analog audio signals using arduino?

[sidpokhrel]

I want to make a laser communication device and would like to multiplex both the audios from L and R channel in the same laser beam and would like to demultiplex it at the receiver and play the 2 audios on different channels on different output(speaker).

 

[Kripton2035]

not sure the arduino would be fast enough for that;
I would convert the audio signal to spdif, then modulate a laser with, and use a spdif demodulator at the other end.

 

[sidpokhrel]

can you please tell what could i use and hot to achieve what i am trying to achieve

 

[Audioguru]

Before Bluetooth, wireless speakers and headphones used FM modulated Infrared, not multiplexed and not dangerous lasers.