I have a Sonos arc connected to the arc output on my tv.

however I have another device that I want to play sound through the Arc without plugging and unplugging. I currently use an

Sonos Arc->HDMI switch ->TV Sony

                                         → other audio device (optical)

since the hdmi switch is bi-directional it does sometimes work but very unreliable and now the ARC(Bravia sync) does not work and I’m not able to control the  arcs volume. Every now and then it starts working again.

I do use the optical dongle to make the connection to the other device.  
 

anyone can recommend a switch that can do what I’m looking for? Or a way to reconfigure this setup?