can the soundbar able to connect to multiple source ?

If a soundbar has only 1 HDMI OUT,1 HDMI IN, Optical
TV have 3 HDMI port with 1 ARC

I planned to connect my desktop PC's sound card optical to sound bar optical port.
From Desktop graphic card HDMI to soundbar HDMI IN

From sound bar HDMI Out to TV HDMI ARC.

I have another 2 devices, Hypp TV Box and XiamoMi.
How I get the sound from my Sound Bar ?