So I have bought a 4k monitor which has no audio output and 5.1 speakers (creative a550), and I want to connect it to my pc, ps3 and ps4 to switch easily between them without losing quality on the output. I was wondering if this will work out: connect the speakers to an external audio card (https/www.amazon.es/dp/B002LM0U2S/ref=wl_it_dp_o_pC_n...), then connect the optical audio input to a switch (https/www.amazon.es/dp/B00RPVTN5U/ref=wl_it_dp_o_pC_n...) and then 3 cables of optical audio connected to the ps3, ps4 and the pc, respectively